Change ILabeled to getLabel() / setLabel()

underscore_case is reserved for properties in haxe. This was causing issues with HaxeFlixel/flixel@ab98badb995f93726819722b23a79e20e9773f28
Added FontDef & BorderDef to FlxUIText, and changed LabelStyle to ButtonLabelStyle in FlxUIButton.
Fixing glitch with FontDef.apply, adding nullability to parameters.
Merge branch 'dev' of https://www.github.com/HaxeFlixel/flixel-ui into dev
Working on carets in FlxInputText. Fixes some but not all bugs.
Fixed caret-position bug with right-aligned text.
Remove some debug traces
FlxInputText: fix for issue #51
Merge pull request #52 from l0rb/patch-1

FlxInputText: fix for issue, closes #51
Working on FlxInputText
Merge branch 'dev' of https://www.github.com/HaxeFlixel/flixel-ui into dev
FlxInputText.customFilterPattern setter activates filter
.travis.yml: also compile for neko
Added 1.0.2 release notes to the changelog
Minor fix to 1.0.2 release notes.
Added ability to set input filters for FlxInputText in xml, added getLabelStyleFromData() function
Update haxelib.json
Fixing infinite loop on cpp target
Merge remote-tracking branch 'origin/dev' into fix_flxinputtext
Update for HaxeFlixel/flixel#1008