Offline Calendar

1.7
* Fix crash on Android 2.3

1.6
* Material design

1.5
* Fix crash with CMs privacy guard (thanks to Clemens Buchacher)

1.4
* An alert is displayed when Offline Calendar is installed on sd card and will not work properly

1.3
* Preparations for Import/Export (Required extra app is not released right now)
* Add saturation/value bar to color picker (allows black/white)
* Improved design following Android Design Guidelines
- Many internal bug fixes