add pan plotting capability to imshow

1.2.6

bump version for pypi release

Various feature updates

• valid geo_transform optionally returned from get_data with a window/geom call
• fix upper-left pixel return when image is buffered outside original extent
• add product level to DGImage meta data
• preliminary code to handle DG 1b files

Added downsampling and LICENSE.txt plus various fixes

bump version commited to pypi.  Added downsampling code and misc fixe…

…s and documentation updates.

Fix requests to previous meta data format

v1.2.3

Bump version number for pypi push.

various fixes

Bug fixes masking/windowing
updates meta data handling - now meta is the base object that can be added to by higher level classes
fixed meta data searches to exactly the input image base name plus file ending.

unittest calls to match updated dgsamples v1.0.1

bump version number for pypi version to match unittest calls to dgsam…

…ples malformed vector fix.

Add TIL in memory handling

v1.1.9

Bump version number for TIL in memory vrt handling branch.

v1.1.7

Bump version for pypi errors.

v1.1.3

Add iter_window and iter_vector bug fixes

Improvements around iter_vector

• Added iter_vector properties and filter
• Added geom to get_data
• Fixed out-of-bound get_data buffer bug