Database backup works!

Several changes, but the big one is #1
1. Database backup works (the button is on the Account tab)
2. There is a change to config.php because of #1 - it is important!
3. Typos and small code style change.  Sooo many typos.
4. Update to forecast appearance to add hi/low and name of date
5. Forecast does not need file locking - removed.
6. Moved header CSS to tabs CSS file.  Although "tabs" are a distinct
library they are fully integrated in this program now - should the files
stop living in a lib directory and live in the main one?
7. Fixed bug with missing right peren that I accidently introduced in
some recent previous iteration.