added output creation options to COREG, COREG_LOCAL and DESHIFTER (keyword 'out_crea_options'); edited some docstrings

components.CoReg.COREG:
- implemented new keyword 'out_crea_options' for specifying GDAL output creation options
- __init__(): edited docstring

components.CoReg_local.COREG_LOCAL:
- implemented new keyword 'out_crea_options' for specifying GDAL output creation options
- __init__(): edited docstring

components.DeShifter.DESHIFTER:
- implemented new keyword 'out_crea_options' for specifying GDAL output creation options

coreg_cmd:
- added parameter '-fmt_out' to global coregistration subparser as well as to COREG call

- updated __version__