Blob functions need fixing

[Doug Blank]

There are a few of issues in using the blob API in Calico:

1. The configureBlob function is missing (consider making it configure("item", ...) so that we don't add too many specialized functions)
2. Doesn't work on small pictures
3. set_rle needs to be exposed, too
4. Not hooked up to click-and-drag in window
5. getBlob() fails

See mailing list on July 16, 2013 for more details.

[Keith O'Hara]

(5) is fixed.

(1) & (4) functionality is in examples/Misc/configureBlob.py

[Keith O'Hara]

(3) is fixed: configureBlob() is now exposed.

[Keith O'Hara]

(2) is fixed.