Hugo import from jekyll

usage: hugo import jekyll jekyll_root_path target_path

Implemented:
 * Create new hugo site
 * Create config.yaml
 * Convert all markdown contents.
 * Copy all other files and folders to static

Fixes #101

commands/hugo.go

@@ -83,6 +83,7 @@ func AddCommands() {
 	HugoCmd.AddCommand(undraftCmd)
 	HugoCmd.AddCommand(genautocompleteCmd)
 	HugoCmd.AddCommand(gendocCmd)
+	HugoCmd.AddCommand(importCmd)
 }
 
 //Initializes flags