basic theme support added
correct improper spacing in preferences.php
make jaymail default theme work again
correct missing semicolon

This is why you test before committing
add $useThemes option and make themes easier to use

Now have jaymail-dark theme display links properly, add functions to
user.php to make getting information on themes easier, check if themes
are disabled in preferences.php and load proper theme in view.php
Merge pull request #4 from TripleJay34/dev-themes

Add themes from dev-themes