COREG:
- some functions are now imported directly from py_tools_ds instead of from geometry
- moved imParamObj and COREG to new module 'CoReg'

DESHIFTER:
- some functions are now imported directly from py_tools_ds instead of from geometry
- moved DESHIFTER to new module 'DeShifter'

Geom_Quality_Grid:
- some functions are now imported directly from py_tools_ds instead of from geometry
- moved Geom_Quality_Grid to new module Geom_Quality_Grid

MAIN:
- fixed a unicode string error within arg parser
- some code style changes
- bugfix for not properly parsing '-calc_cor'
- __version__ is now imported from package.__init__

package.__init__:
- added __version__

UTL:
- removed deprecated imports

IO:
- revised some imports

GEO:
- removed all imports of functions that are not directly needed within geometry

new modules:
- CoReg
- DeShifter
- Geom_Quality_Grid