MySQL for Python MySQLdb-SVN

Check in some old changes

Reimplement MySQL->Python type conversion in C; much simpler and easier to deal with now. Hey, all my tests pass, so I guess that means I need to write some more tests.

By exposing connection on result, decoders can be simplified: Only the field object is needed. Turned on leak testing and found a leak writing BLOBs. removed one of the old stubs in Cursor.

figleaf revealed that the INSERT_VALUES regex never matched. Added a test for this, and fixed the regex (forgot to add group anchors)

Add a connection.ping() test. Oh look, it's broken.

Fix #2671682. (from 1.2 branch)

Tons of changes from major refactoring/cleanup. This is all really broken
right now. In particular, all results are returned as strings.