Bug Fix Commit

Couple of annoying bug fixes including:
* MySQL login check failing but returning success
* Errors not being reported on Settings Update failures
* Removal of DROP TABLE commands in install.sql
More Little Fixes

Lots more fixes with the content and meta tables, queries, structures,
and what to do when the requested URL just doesn't make sense.

Manifest theme also updated to show Tweets in the Search results.
API & DB Updates

Updates include:
* API Email updates
* NoNull() Update
* Content SQL Query Fixes