Fix Minecraft item image hosting URL

Signed-off-by: JWhy <jwhy@jwhy.de>
Introducing HMVC controllers, moved admin controller to subdirectory (for HMVC)

Signed-off-by: JWhy <jwhy@jwhy.de>
Clean up controller code

Signed-off-by: JWhy <jwhy@jwhy.de>
Create Custom Controller Class (c4) with check_admin() method

Signed-off-by: JWhy <jwhy@jwhy.de>
Finish implementing apply_update() method in MinecraftItem model

Signed-off-by: JWhy <jwhy@jwhy.de>
Create 'Item Database Manager' page for admin panel

Signed-off-by: JWhy <jwhy@jwhy.de>
Removed CSS span classes from divs and link to profile page on username menu entry
(Profile page menu option now in dropdown menu)

Signed-off-by: JWhy <jwhy@jwhy.de>
Created CSS for 'Item Database Manager'

Signed-off-by: JWhy <jwhy@jwhy.de>
Recompile Bootstrap to use 9 instead of 12 columns (there's not that much content...)

Signed-off-by: JWhy <jwhy@jwhy.de>