[EPIC] Replace MySQLdb package with SQLAlchemy

[spherulitic]

Will require tickets for the following:

• [x] #149
• [ ] #150
• [ ] #151
• [ ] #152
• [ ] #153

These can be done independently; stats will be a quite large LOE and may need to be done piecemeal.

Note SQLAlchemy 2.0 was just released.