doku cleanup step 1
doku clean up step 2

merging to different doku folders:
moved files from old doku folder to new one.
Docu cleanup step 3

- generated new svg. pictures from the odg file
- renamed doku folder to Documentation
Merge remote-tracking branch 'upstream/master'
Merge pull request #2 from richi235/master

cleaned up docu folder(s) and updated module structure diagramms