Added hex-html color string parsing to FlxColor
Added all the static colors from FlxColor to FlxColor.fromString()
Uses a macro to get all of them.
Changed the Array<{name:String, color:Int}> to a Map<String, Int>
Return null if the string can't be parsed.
Merge pull request #1233 from mrcdk/flxcolor-fromString

Flxcolor fromString