In this pull request an update of the Android client is provided.
Most parts of the old source code has been updated to Android 4 preferred code. For example fragments are used where activities and dialogs were used. The client is still compatible with Android 2 because the Android support library v4 was used. No new functionality was added (compared to the last Android released code). Also it should be 100% compatible with the last Remuco server release. Overall (the Android client) code is slightly re-ordered, hopefully for the best; but I have no numbers to back that up.Note: Currently only the search functionality has not been ported. (I am planning to do so, but on a different branch).