Add ExpandableList Activity
Adding a getter for the ExpandableListView
General refactoring + Throw Exception when using setActionBarContentView

Closes #26
Add of a new attribute in the GreenDroid theme

Developers may apply basic style to the tabs of a GDTabActivity directly from the XML. For advanced styling look at the `createTabIndicator(CharSequence)` method

Closes #29
Use an AsyncImageView instead of a regular ImageView

The ThumbnailItem has a new parameter which may contain the URL of an image to download. The previous drawableID is now used as the default drawable.

Closes #21
Add of some basic ImageProcessors
Use longs for time related constants
Add an Exception to prevent using setActionBarContentView in GDListActivity
Add some new Javadoc to GDListActivity
Modify the GDCatalog sample so that it uses createLayout instead of setContentView
Use this instead of class when comparing ...
Retrieve ActionBarItem default colors from theme attributes

Closes #38
New MapPinDrawable dedicated to MapViews
Add a new widget: PagedView
Fixed missing leading zero for single digit hex values.

Closes #39
Update the CHANGES & README files
Use defStyle into account in the constructor
Prevent possibly loading images with the wrong options
Re-format the source ... was using tabs instead of spaces !?!
Make sure the mExtraState array is not null

mExtraState was previously only initialized by a drawableStateChanged() method. Unfortunately, there are some cases were this method is not called during a View initialization. In those cases the selected dot was never drawn as selected (mExtraState was null in the onDraw)
Add a more precise method to create custom tabs
Added ability for AsyncImageView to reference files in an app's assets folder, using the file:///android_asset/[filename] syntax used in WebViews.