mvm_gd_frostine b9

+ many details were added
+ small optimizations
+ custom snow particle has been added
+ added skybox
+ added "normal" mission
+ added robo hat "bolted bomber"
hat visible only when server has "sigmod" plugin.
~ changed robots path

and others.

Everything packed in .bsp expect the .nav and .pop files

packed custom content into .bsp expect nav and pop files to avoid server crashing.

~nav got regenerated. the nav is not perfect but works for right now!
~didn't fixed crashing issue

~renamed the .Pop and .Nav file.