Fixed previous bugs with training not decaying stats because FLOAT in mysql was not enough to represent precise enough floats.

Started working on Inventory. Added basic graphics for it client side and fragments etc. Added response class as well, although not a request class, so currently I'm creating a fake response client-side. TODO: Implement it server-side and use that on client side.

Signed-off-by: MaloW <MaloW@spray.se>