Androidclient

Remuco Android 4 client
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In this pull request an update of the Android client is provided.
Most parts of the old source code have 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).

Screenshots
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![alt text](http://dl.dropbox.com/u/4362832/remuco1.png)
![alt text](http://dl.dropbox.com/u/4362832/remuco2.png)
![alt text](http://dl.dropbox.com/u/4362832/remuco3.png)
![alt text](http://dl.dropbox.com/u/4362832/remuco4.png)