Finally some render progress! #TrainsInMotion #Traincraft (1.7.10 rewrite)

- Made some progress on the GUI.
- Added a new description for the passenger rollingstock to define how many seats it has.
- Added a new description to define inventory slots in freight rollingstock.
- Fixed the naming in the VAT Log Car, apparently the parse doesnt like capital letters.
- TMT CHANGE: changed the null string to just a blank one, to avoid some crashes.
- Fixed a potential issue with positioning and defined entities with the key press packet.
- Reworked the URI's, they make more sense now.
- Fixed a crash related to opening the GUI from the event manager.
- Removed the inventory slots for passengers, and added the slot to define the ticket players need.
- Added some new entries to the language file.
- Removed some useless textures.

- And most importantly, reworked the render. Need to finish the bogie render stuff, and get it to cover scale and rotation as well, but the caching and rendering has all been reworked to not only be significantly more efficient, but also more versatile. The entities can now render blocks at positions defined by their model.
I'll have to finish it up tomorrow, then deal with the GUI stuff.
A thanks to Zora No Densha and Fexcraft for lending me a hand with the render stuff.

With any luck I can still manage an alpha release this weekend.