Added processing of named colors.
Closes #10
Saving image_cache to file; closes #11.
Corrected behaviour of image cache.
Also added some comments and verbose messages.
- Updated CHANGELOG and VERSION
- Added info in README and man page about saved image cache
Suppressing error message when no "image_cache" file is present.
including a few comments
Small changes to LICENCE.md
Merge branch 'master' into v1.0.0

Conflicts:
	src/NotificaThor.c
	src/wins.c