Add a comment for keywords with snippets
Change completion help shortcut to Ctrl+F1
Add docs for the "F1 for details" shortcut to calltip
Italic shortcut info
Same style for "Tab to insert snippet"
Only do the HasSnippet() check when necessary
Only show "Press F1" text when necessary
Consider OpenFL .hxp files as haxe files

see http://www.openfl.org/documentation/projects/project-files/hxp-format/
FileHelper.IsHaxeFile() -> IsHaxeExtension()
Merge branch 'development' into openfl_hxp

Conflicts:
	External/Plugins/ASCompletion/Model/FileModel.cs
Add TemplateItem to override Description for shortcut hint
Merge pull request #421 from Gama11/openfl_hxp

Consider OpenFL .hxp files as haxe files
Fixes Null References Error from 'new FileModel(null)'
Keep the original method signatures and add overloaded methods.
Merge pull request #441 from SlavaRa/improvement-ASCompletion.Completion.ASComplete

closes: issue #382
Hide AIR properties button / menu item instead of disabling them
Merge pull request #443 from Gama11/HideAirProprties

Hide AIR properties button / menu item instead of disabling them
Change Help shortcut back to just F1
Add a snippet and a template for Haxe abstracts
Merge pull request #445 from Gama11/HaxeAbstract

Add a snippet and a template for Haxe abstracts