FIXED: Huge facebook button in ArtistDetailsActivity
CHANGED: App theme is no Holo.Dark
ADDED: About section
REFACTORING: Code organized in sub packages
ADDED: Donation usging PayPal-Android-SDK (currently only working for USD payments due to an API limitation)
Merge branch 'Paypal_REST_API'
IMPROVED: Donation amount selection
Merge branch 'Paypal_REST_API'
FIXED: incorrect MainActivity layout on in landcape on ldpi devices
Version number bumped