Added createFromAssets method in ImageUtils
Added AsyncTasks and Listeners for async loading assets from adapter or
activities
Refactored Db access and usage
Changed Arraylist to List
Images loading relative to given path
Merge branch 'story-9-task-44' into story-9-task-44-bis

Conflicts:
	src/com/quizz/core/application/BaseQuizzApplication.java
	src/com/quizz/core/db/dao/BaseQuizzDAO.java