Added support for the activity Choice

Added support for the activity Choice.
Cleared the sass cache.
Ignore sass cache
Update ignore rules
Added blocking notifications masks where needed

- Added blocking notification masks when the application needed to
be blocked.

- Refactored the notification mask mechanism.

- HomeOrg store is loaded only when the AaiAccount view is shown.
Upgrade to Sencha 2.1.1
Added Partecipants list

Added a toolbar in the ModuleList view with buttons
Partecipants and Grades.
Every entry in the list has a checkbox that allows the selection.
A bottom toolbar allows to clear the selection, select
all and contact the selected partecipants.
Added grades support.

It is now possible for the user to check the course and activity
grades. The grades are course related. Every course has its own
grades list.
Added SingleUploadAssignment + Refactoring

	- Added SingleUpladAssignment support
	  Uploading files is now possible. Unfortunately the
	  xtype file has a bug that breaks the functioning on
	  the Android platform so instead of the xtype file
	  the simple xtype textfield is used. Once the bug is solved
	  this is going to be fixed.
	- Re-factored the WebService code.
	  Added support for POST and GET requests. This is particularly
	  necessary for file uploading support.
Upload Assignment Draft Support

The upload of multiple files is ready. Choosing the files is not
ready yet because of a sencha bug affecting the xtype:file
component.

So this is is only a draft. Some checks are still missing
such as the maximum number of files to upload in the assignment.
These checks are going to be implemented after the bug affecting
the xtype:file component is fixed.
Upgrade to Sencha 2.2.1
Upgrade to Phonegap 2.9.0

Switched to the FileTransfer and removed the Downloader plugin.
Added the javascript loader for better multi-architecture support.
File selection fix; initial Assign draft

The file selection is a little bit buggy but works now.
This commit also carries an initial
Assign (moodle 2.4 branch new assignment activity) draft.
Drop local assignment submission report stores

All the assignment submission information are now fetched from
the platform. This avoids cache problems when the user submits
the assignment again from desktop.
Added Assign support; refactored Assignment

Added the Assign support.
Refactored Assignment code.
Date bugfix in the module list section.