Added MANIFEST.in to fix pip packaging failure. Updated code
to fix exception when context is defined by a dictionary, and
to support active=something kwarg in MultiString constructor.
Used git commit -a to commit all the things noted in last commit comment.
Merge git://github.com/jonathaneunice/MultiString into jonathaneunice

Conflicts:
	setup.py
Cleanup after merge with 03b5a1ccb6d59c0cb36e03db609006e6f1c02553 from
jonathaneunice
Remove temp mergefiles.