Glymur

Remove GDAL from setup.py requirements

Removed support for python2.7
Fixed Cygwin support
Fixed appveyor builds, Travis-CI framework reworked
Some fragile tests removed

Qualify on Python 3.8

Fix geotiff UUID corner coordinate string representation
Improve warning and error messages
Correct improperly raised exception types
Remove build/test for Python 3.4 (EOL)
Fix read-the-docs requirements

Add support for ICC profile raw data
Fix parsing of negative resolution box exponents

Qualify on Python 3.7
Fix documentation typo