- removed POCO dependency from bug patch

Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>
- started to remove dependencies to the implementation detail "ProportionalTimeGeometry" where not necessary. Rest will be done in a new bug (after merging with new mitk release branch 2014.10)

Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>