Change background to new IRMA style.
Add fullscreen support (toggle on touch).

Relates to #3.
Add Ubuntu fonts.
Move shape to proper directory.
Use irma dark blue for text.
Use new IRMA style on main screen, remove dialogs.

Instead of using dialogs to give feedback on what is going on, the
feedback is shown on the main screen.

After showing feedback, the main screen returns to the start state.

Only works for Nexus 7 tablet, not yet on phone.

Fixes #3.
Cleanup imports.
Add real full-screen support (hide navigation buttons).
Make app not fullscreen on startup.
Make fullscreen default.

Note that coming out of fullscreen requires two touches at the moment.
The first touches unhides the navigationbar at the bottom, the second
touch unhides the statusbar and the actionbar. It appears it is not
possible to capture the touch/event that unides navigationbar.
Add IRMA arrow and verifier logo. Remove progressbar.
Make top and bottom margins equal.
Catch a broader range of exceptions.
Swap icons used for status.
Disable foreground dispatch for NFC for now.

Disabled it because it seems to interfere with the intent-filter
approach.
Replace 'waiting for card' and 'found card' icons.
For now, always show the red cross when something went wrong.
Update default status icon in layout file.
Make handling of (NFC) Intents more robust.

Occasionally there were stability problems where foreground
dispatch and the Intent system seemed to interfere. This commit hopefully
fixes this.
Add support for animated arrow.

While the app is checking the credential the blue arrow in the bottom
will animate.

The source for the animation is an animated gif. An interesting twist is
that you need to disable hardware accelaration (in the Manifest) for the
animation of the gif to work.