Changing the directory/package structure of the code.

Files where just moved, so git can keep trak of the history. It'll not work in this commit.
Changing packages paths so the code works again.
Removing old Terminal activity.
Moving some strings in strings.xml, for a cleaner layout.
Stub for the German language. One more language to issue #27
Just an example string
Update strings.xml
Just cleaning some unecessary lines
New class to aid in the calibration of the accelerometers.
Integrating the calibration function into the app.

This closes #94 .
Improving the UI for the calibration function.
Merge pull request #113 from arthurbenemann/issue94_level_calibration

This adds the feature of calibrating the accelerometers using DP. Closes Issue94 "level calibration"
Merge pull request #109 from Mevel/patch-2

German Translation
Merge branch 'German_translation'
Preparing for release v0.8.3