Adding automatic Alembic stuff

Alembic stamp and upgrades now happen automatically on server start.
Shouldn't ever have to run alembic from the command line manually.
Fixing client side thread crash

If the server goes down temporarily or the client just cannot connect
for whatever reason, the client side flushing thread was crashing.
This error is now caught to stop this crash.
Using Alembic api instead of sys.command

This is causing cherrpy logging issues for some odd reason.
I'll look into it later.
Updating readme to account for alembic changes
Merge pull request #95 from dannybutler/master

Adding automatic Alembic stuff