Schema-object

* Sub-parts of indices are now correctly added
* Fixes error with foreign keys against unique or primary key columns

* Column types are no longer forced uppercase
- Fixes ENUM, SET bug where data values were incorrectly uppercased

* Column DEFAULT fixes
- strings are now quoted (except CURRENT_TIMESTAMP),
- non-None values handled ('', 0)
* CHARACTER SET AND COLLATE omitted from column definition if same as parent Table.
* Fixed Column definition syntax (ordering of attributes)

* bug fixes
* updated test configuration, added more tests
* added ability to retrieve comments on columns
* updated collections.orderedDict
- added support for index(), insert() and __delitem__()
* changed output of database options
- CHARSET is now CHARACTER SET
- <key> <value> is now <key>=<value>
* newlines and multiple spaces removed from table.create() string
* Changed DatabaseConnection to explicitly require a call to connect()
* backported to work with python 2.4
* schema name dropped from table.alter() and table.drop() to be consistent with table.create()

* Initial public release