internal array attributes of COREG and COREG_LOCAL are now GeoArray instances; added algorithm for calculating shift confidence

components.CoReg.imParamObj:
- refactored class to 'GeoArray_CoReg' - a subclass of GeoArray from external package 'py_tools_ds'
-> fixes duplicate attributes within old class imParamObj
- revised attribute settings
- revised add_mask_bad_data()

components.CoReg.COREG:
- COREG.ref and COREG.shift are now instances of GeoArray
- refactored attribures 'matchWin' and 'otherWin' to new attributes 'matchBox' and 'otherBox' (instances of boxObj)
- attribures 'matchWin' and 'otherWin' are now instances of GeoArray class -> allows easy visualization and attribute access
- added new attribute 'confidence_shifts' -> represents some kind of quality assessment for the calculated shifts
- show_matchWin():
     - added docstring
     - function body simplification due to new GeoArray attributes
     - added alternative to interactive mode
- added show_cross_power_spectrum(): function for quickly visulaizing an interactive 3D surface plot of cross power spectrum
- _get_opt_winpos_winsize():
    - added docstring
    - added automatic adjustion of matching window size in case matching window extent exceeds dimensions of input image overlap area
         -> fixes wrong shift values at the input images (appeared in case of slighly structured image border / if border was no straight line)
- _get_image_windows_to_match(): adapted function body to new GeoArray attributes
- _shrink_winsize_to_binarySize():
    - adapted function body to new GeoArray attributes
    - bugfix for not updating COREG.success in case matchign window became too small
- _get_peakpos(): added docstring
- added _calc_shift_confidence(): function for calculating a single confidence percentage for assessing calculated shifts
- _get_deshifted_otherWin(): - adapted function body to new GeoArray attributes
- calculate_spatial_shifts(): added automatic calculation of shift confidence

components.CoReg_local.COREG_LOCAL:
- __init__():
    - added 2nd tieP_filter_level to docstring
    - COREG_LOCAL.imref and COREG_LOCAL.im2shift are now instances of GeoArray
    - added assertion regarding tieP_filter_level

components.Geom_Quality_Grid.Geom_Quality_Grid:
- _get_spatial_shifts(): now additionally returns COREG.confidence_shifts
- get_CoRegPoints_table():
     - 'added new column 'CONFIDENCE' to Geom_Quality_Grid.CoRegPoints_table
- _flag_outliers(): catched empty GeoDataFrame exception
- test_if_singleprocessing_equals_multiprocessing_result(): now disables RANSAC outlier detection during calculation

- updated __version__