Implement keyboard hotkey bindings (heavily squashed)

- add keyboard bindings button to options
 - hooked keyboard binding panel to button
 - WIP bindings drawn in activity
 - keyboard binding keys finally appear
 - keyboard binding input widget
 - reserved keys logic working
 - removed debug logs
 - pref saved on key release
 - more reserved keys
 - fixed memory bad alloc error
 - modifier bindings
 - scroll panel for bindings view
 - added sdl id to bindings
 - cache sdl scan id into prefs
 - function ids are getting picked up
 - more keyboard mappings
 - more key bindings + reserved keys
 - keyboard bindings working
 - write keyboard bindings pref on load
 - sync new functions to prefs
 - final touches
 - Keep those include trees flat (see 0179cefc)
 - Fix tabs
 - WIP - many to one binding
 - WriteDefaultPrefs is now instance method
 - model add, remove and save methods
 - clear prefs before saving
 - added method for checking binding conflict
 - notify view on key combo change
 - route binding notification to gameview
 - view foundations for overhaul
 - fixed memory issue + has conflicting key issue
 - fixed prefs not being cleared before save
 - override text input to do nothing
 - fixed many complications due to duplicated hotkeys
 - missing index on new model caused problems
 - WIP - view adaptation
 - WIP - add and remove button layout
 - more patches
 - fixed empty textboxes problem
 - WIP - frontend overhaul
 - fixed ordering issue
 - binding removal - wip
 - function store to hold no shortcut data
 - reset to defaults button added
 - add from no shortcut works
 - error message on conflict
 - better summary for PopBindingByFunctionId
 - keyboard bindings hooked to gameview keypress
 - do not return correcty function id if no shortcut
 - flatten include trees
 - remove debug comment
 - spaces to tabs

SConscript

@@ -551,7 +551,7 @@ if GetOption('no-install-prompt'):
 
 
 #Generate list of sources to compile
-sources = Glob("src/*.cpp") + Glob("src/*/*.cpp") + Glob("src/*/*/*.cpp") + Glob("generated/*.cpp") + Glob("data/*.cpp")
+sources = Glob("src/*.cpp") + Glob("src/*/*.cpp") + Glob("src/*/*/*.cpp") + Glob("src/*/*/*/*.cpp") + Glob("generated/*.cpp") + Glob("data/*.cpp")
 if not GetOption('nolua') and not GetOption('renderer') and not GetOption('font'):
 	sources += Glob("src/lua/socket/*.c") + Glob("src/lua/LuaCompat.c")