Merge pull request #7 from bobsta63/master

Added default view to load 'Invoices' when initially opening the 'Billing' module in ZPanel.
Theme Update

- Made it easier to add themes
- Removed cache and robots from headers ( this can be done ny .htaccess
and robots.txt )
Update to pay.php

Missed a slash
Merge pull request #1 from EliteEng/master

Theme update