Minor but spread-out changes:
 - Text blurry-fix (see https://github.com/Draknek/FlashPunk/pull/123)
 - Sfx loop changes from BNeutral (see https://github.com/BNeutral/FlashPunk/commit/d6db91b666623c5414e98d80e893d187a236dc17) | also involves that SOUND_COMPLETE is called when all Sound loops end
 - HP.defaultFont no more embedded (so now works on Android too)
 - clear cache methods for Sound and BitmapData
 - HP.MAX_INT
 - docs