Fix issue when altering the primary key of a table.
Check to see if there are any alterations at all before calling an alter table statement.
Add some default attributes to the PDO connection.
Add the proper Db::QUERY_DEFINE when altering MySqlDb.
Refactor like clauses into MySqlDb->buildLike() so that subclasses can perform different like comparisons.
Implement table alterations and index creations in SqliteDb.
Db test suite changes.
Move the phpunit.* files into the /tests directory.
Remove an old autoload file and add /cache to .gitignore.