* Image Picker WIP
* Image picker work in progress
* Small fixes
* Improved the option reading process and some code cleaning.
Merge branch 'master' of github.com:phoboslab/Ejecta into imagePicker
* image picker's getPicture method is now retaining the javascript picker object (and objC one) until the end of execution of the callback.
* Camera roll picker implementation seems complete.
* Fixed EJTexture's initWithUIImage method for retina.
* Removed the image format and jpeg compression parameters, not used any more.
* Image picker related cosmetics
* imagePicker: fixed the automatic max texture size when app is in retina mode.
* The binding to the method isSourceTypeAvailable is now returning a JS boolean value.
Removed debug messages; Cosmetics
Read texture pixels through a temp FBO instead of attempting to reload from disk
Merge branch 'pr/287'
Use JSValueToNSObject to simplify IAPManager internals
Added methods to get player and highscore info from Game Center; thx @finscn. See #297