Add benchmark for connect-sqlite3
Make expire condition more standards compliant

I could only test this easily with PostgreSQL, but I'm using only SQL
standard functions and types.  As far as I know, this should work with
any RDBMS that implements the SQL standard.  That said, further testing
would be well warranted.
Added support for native JSON type

Using the JSON format for PostgreSQL caused get to explode since the
return was already an Object.  A check was added for when the returned
sess is a string.
Added better exception handling
Added ISO compliant date strings

Seems to have fixed remaining PostgreSQL issues
General cleanup

Added some missing semicolons to get JSHint to shut up
Merge pull request #1 from chall8908/fix_expire_bug

Fix expire bug
Bump version
Update readme
Remove string
Add sqlite3 bench