Guild logo upload

Guild logo system - using GD library, using GIF images

- First of all I dont know why my github repo did with the config.php file :+1: 

I made a default logo (150x150) so new guilds will have that one, only leaders can upload a new logo and will be saved at /engine/guildimg/.gif

Image is resized to 150x150 in order to prevent some malicious code to be ran, reading the image string and converting it to a new imagegif so that means that transparent backgrounds and animations are not supported for guild logos

http://4.ii.gl/waET4k.png

http://1.ii.gl/aMhSN8.png