ignore dist and MANIFEST
minor fixes to packaging
Restricted the text files included by python sdist.
Application: use local, private files that should not be packaged.
More discriminative inclusion of documentation files.
Backup files, etc. are not included anymore.
Original pictures moved out of git control: git is mostly used for publishing
the code, not storing multiple, unused pictures.
Merge branch 'release'

Conflicts:
	MANIFEST.in