Deposit system

This deposit system is similar to the one they use here on themeforest (and other envato sites)

It includes

* A deposit system ofcourse
* Deposit history
* PDF generation for individual deposits or complete list of deposits
* Switch between sandbox and paypal
* Advertising page (user can extend existing advertisements, this is also an example page from what you can do with this deposit system)
* Simple functions to call important database information