#### Is this adding or improving a _feature_ or fixing a _bug_?
Feature.
#### What's the new behavior?
This pull request adds paths to `Range` objects, including the selection. The paths and keys are kept in sync automatically, so that you can use whichever is ideal for your use case.
This should allow us to use paths for lots of the internal logic, which are much quicker to work with than keys since they avoid having to lookup the key in the document and can just traverse right to the node in question.
#### How does this change work?
`Range` objects have two new properties:
```js
range.anchorPath
range.focusPath
```
(Eventually these will be `range.anchor.path` and `range.focus.path` when points are introduced.)
When operations occur and whenever ranges are created/normalized, the paths are updated and kept in sync with the keys.
#### Have you checked that...?
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Please run through this checklist for your pull request:
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* [x] The new code matches the existing patterns and styles.
* [x] The tests pass with `yarn test`.
* [x] The linter passes with `yarn lint`. (Fix errors with `yarn prettier`.)
* [x] The relevant examples still work. (Run examples with `yarn watch`.)
#### Does this fix any issues or need any specific reviewers?
Fixes: https://github.com/ianstormtaylor/slate/issues/1408
Fixes: https://github.com/ianstormtaylor/slate/issues/1567
* Use slate rather than relative path
* Move benchmark to one dir
* Use slate-* instead of relative path
* Before and After Function
* Remove un-necessary cross-env
* Hard fix
* Lint the hard fix
* Reset memory in bench()
* Working on Benchmark Frameworks
* Rename to slate-dev-benchmark
* Add packages
* Fix prettier bug
* Benchmark framework is in working
* Do not log in test
* max times test
* mute logger in test
* add hr time
* Better support for maxTime; add support of split runs to save memory space
* Fix maxTries
* Add global.gc
* Global gc for each bench
* Better test interface
* Test max-time
* Test max-time done
* Add Benchmark among packages
* Starting to get benchmark running
* Pure Node lib
* Change babelrc for pure Node benchmark
* Moving Benchmarks
* Get benchmark and test running
* Get benchmark for slate-html-serializer
* add slate-react
* add slate/changes
* all benchmarks are converted
* Run benchmark by yarn
* Run benchmark with expose-gc
* Annotate Bench.js
* Do not bundle slate-dev-benchmark in rollup
* Add annotation
* Allow config file to enable part benchmark compare
* Add config for compare
* support compare.js
* Do not re-allocate memory; due to a large heap taken influence result
* Render with Decorations
* get active marks at range
* Fix bug in showing percents
* Fix percent showing bug
* chore: add more benches
* Better output of benchmark
* Fix linting
* decoration and normal as different benchmark test
* Fix deserialize benchmark
* README.md
* Fix Readme.md
* README.md
* block-spacing config
* safer user config loading
* use package.json to load package in test
* Consistent linting
* move components to parent directory
* Annotation styling in package
* margin line before multi-line block
* Fix naive bug
* Fix naive bug
* Fix a blank line
* only log user and hr
* Better name
* Better annotation for runBundleTasks
* Fix typo
* Better logger
* Move async to test
* Omit skip
* Only log the user space time
* Single line async sleep
* file name fix
* Fix annotation
* Better output of compare
* Remove get-characters(-at-range) benchmarks
* Restore emoji
* Capitalize types
* Remove compare to another area
* Add grep and config interface
* Linting files
* Linting benchmarks
* Linting benchmarks
* Update yarn.lock
* Set up webpack configuration for building examples
* Configure react-hot-loader in development
* Improve config, set gh-pages to use examples/dist directory
* PR feedback
* Rename App.js in git
* Add Prettier, with basic config and ESLint integration
* Apply Prettier to all files using `yarn lint --fix`
* Tell Prettier to ignore an empty text in a test output.
* Run Prettier on JS files not handled by ESLint, and lint them too
* Implement first working rollup config for main slate pkg
* Convert slate-base64-serializer to rollup
* Convert slate-dev-logger to rollup
* Convert slate-html-serializer to rollup
* Convert slate-hyperscript to rollup
* Convert slate-plain-serializer to rollup
* Convert slate-prop-types to rollup
* Convert (mostly) slate-react to rollup
* Convert slate-simulator to rollup
* Misc cleanup and configuration tweaks/fixes
* Convert slate-schema-violations to rollup
* Successful rollup build for top-level examples
* Add plugin to replace process.env.NODE_ENV
* Only rebuild modules and dev examples in watch mode
* Enable sourcemaps for development builds
* Force debug to use browser version, remove builtins plugin
* Remove is-image from example
It relies on node `path` and wouldn't work well in-browser anyway
* Use browser version of react-dom/server
* Move stray require to import
* Configure examples to watch child package output
* Fix tests
* Remove unneeded preferBuiltins from resolve config
* Use more precise files array to ensure sourcemaps aren't included
* Use lodash instead of lodash.throttle
It's pulled in anyway since slate-react needs slate, so using the
minipackage actually causes code duplication
* Improve naming/fix UMD builds, update UMD doc
* Add rollup configs to linting, add a missing dep to package.json
* Use longform rollup CLI flags
* Add rollup-plugin-auto-external to reduce external module configuration
* Combine rollup config into a unioned helper
* Centralize to a single rollup configuration
* Update dist structure and package field naming for PR feedback
* Add comments and address PR feedback on rollup config
* i.e. -> e.g.
* Add some spacing to the configuration to improve readability
* Add a bit more spacing
* Remove umd from example Slate unpkg link
* Allow React 16 in peerDeps and use it for dev
* Make tests pass with React 16
Changes are cosmetic:
- React 16 no longer adds a trailing `;` to `style` attributes
- React 16 outputs `0` and not `0px` for sizes in `style`
