Create Train Additions

new content:

- small platform (white, red, blue, yellow)

- platform (white, red, blue, yellow)

- Anti-rust spray

- Mastsign (8 variations)

- rusty poles (two states for all three pole variations)

new changes:

- retextured all poles to girder texture

- retextured signal controller to railway casing texture

- retexmodeled main signal

- retexmodeled approach signal

- retexmodeled block signal

- retextured all pole textures of signals to girder texture

coming in the next update(s):

- new textures for create 0.5.1 update

- new signal system for internal use (not country based)

retextures of old models