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
Minor changes
Refactored database access
Added DbHelper construtor parameter
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
Fix: Divide by 0 exception
Source format
Added abstract method to get json file path
Added loading layout
Added listener for sections loading
Fill adapter with levels from section in arguments
Fill adapter with real values
Added support for arguments when navigating to fragments
Minor changes
Merge branch 'story-9-task-44-bis'

Conflicts:
	src/com/quizz/core/db/BaseQuizzDAO.java
	src/com/quizz/core/db/DbHelper.java
	src/com/quizz/core/models/Level.java
	src/com/quizz/core/models/Section.java