Revert "Use a custom font"

This reverts commit 7a2daf3a83eeb485a855e2928dc4e094a6914d0a.
Fix render error due to malformed drawable
Remove unused drawable
Rework basic controller UI
Merge branch 'master' of https://github.com/tvbarthel/Adaptilo
Use a custom activity
Implement QrCodeHelper to verify scanned content
Make helper static and non instantiable
Add QrCodeException
Merge branch 'master' into zxing_customization

Conflicts:
	Android/app/src/main/java/fr/tvbarthel/apps/adaptilo/engine/AdaptiloEngine.java
Tweak controller design
Merge branch 'master' into zxing_customization
Use a specific module for customization purpose
Remove some stuff
Also customize zxing-core
Keep removing stuff (we are only interested in QrCode Reader)