3.1.1
* Fix key export to files (they were written partially)
* Fix crash on Android 2.3

3.1
* Fix crash on Android 5
* New certify screen
* Secure Exchange directly from key list (SafeSlinger library)
* New QR Code program flow
* Redesigned decrypt screen
* New icon usage and colors
* Fix import of secret keys from Symantec Encryption Desktop
* Subkey IDs on Yubikeys are now checked correctly

3.0.1
* Better handling of large key imports
* Improved subkey selection