This Mod is no longer being worked on. My new Mod: 
replaces this one!
Features:
- Adds a new Banner Slot to the Horse Inventory
- Renders the banner on the sides of the horse
Custom Texture:
- The mod overrides the default horse inventory for all horses with the extra slot
- To change the texture of the inventory download this image and put it into a resourcepack under "horsebanners:textures/gui/container/horse.png"
TODO:
- Fix too big itemstacks on Shift Click
- Fix banner offset from horse when not sadelled
