components.CoReg:
- imParams: mask is now calculated from only one band -> avoids reading the whole datacube

components.CoReg_local:
- COREG_LOCAL:
    - __init__(): some docstring modifications
    - added attribute '_success'
    - property quality_grid: now shows calculated coreg points figure in verbose mode
    - view_CoRegPoints(): added outlier filtering for points in figure
    - correct_shifts(): bugfix for trying to corrects shifts without GCPs

components.Geom_Quality_Grid.Geom_Quality_Grid:
- GCPList: bugfix for running to_GCPList() twice
- get_CoRegPoints_table(): disabled verbose mode during grid calculation
- to_GCPList(): now returns an empty list if no valid matches are available

MAIN:
- major revision; added subparsers; added argparser for COREG_LOCAL
- added run_global_coreg()
- added run_local_coreg()

- updated __version__