Banner system

I've written a far more advanced banner system which I'll be adding to the e107 core with the next release.

I've written a far more advanced banner system which I'll be adding to the e107 core with the next release. All details are now added from your admin area, clicks/impressions/ip addresses etc are all stored, and there is a custom screen for your banner clients to check their statistics (for a sneaky look at the stats for my Sourceforge banner go here and login using amused as the password). I'd like to publically thank Craig Bramscher for his help with this new system, he knows why.