Merge pull request #109 from maxfierke/master

Remove remaining uses of request superglobals. Fixes #72.
Tweaking the add user / edit user password validation. Fixes #105.
Deleting users didn't work. Fixes 110.
Removed some dead code.
Better checks if current session is _still_ a valid user. Fixes #111.
Fix warning when order is not set
Fix PHP-Warning: Invalid argument supplied for foreach()
Some fixes when vars are not defined
Can disable jquery, for RSS feed for instance
Make sure jquery is disabled so it's  not append to the RSS
Merge pull request #115 from richardhinkamp/master

Fix notices
Merge pull request #118 from richardhinkamp/rss

Some fixes when vars are not defined
Add database driver existence checking to lowlevel database checks.

Checks if the configured database type's PDO driver exists and is loaded. Returns a lowlevelError if it is not and returns a lowlevelError if the configured database type is not mysql, postgres, or sqlite.

Signed-off-by: Max Fierke <max@maxfierke.com>