#105: Add possibility to support TexturePacker format
#105: Initial support of TexturePacker format

- FlxSpriteTex - FlxSprite for TexturePacker atlas
#105: Fix FlxSpriteTex for flash target
#105: Trim support for FlxSpriteTex
Merge pull request #257 from sergey-miryanov/dev

TexturePacker support, rev 2.