Fixes for aligning_guidelines and centering_guidelines

aligning_guidelines:
- Bugfix for rotated objects - rotated objects should be aligned correctly

centering_guidelines:
- Fix for objects with different origin (originX or originY != 'center')
- Fix for clear lines
Merge pull request #395 from Kienz/aligning_centering_guidelines

Fixes for aligning_guidelines and centering_guidelines