[CTF] Metro

New map release, METRO_R2.
The download link is on the first post.

Packer forced me to make a new release, since he could not stand the floating crates in the previous version  
So I decided to fix this issue, and I ended up improving other things too!
I bumped the map version to r2 instead of r1e because there have been many changes since the first release.

Changes:

• fixed a few floating crates
  
• put a truly metallic texture on the trains (the old texture was actually painted concrete... you were right about this Justin)
  
• the two teleporter exits are now on the stairs above the station (thanks for the suggestion Smilecythe)
  
• more detail brushes
  
• fixed more misaligned textures
  
• use new weapon entity names
  
• put a LICENCE file in the PK3 (GPL2)
  
• minor other cleanups
  

I would like to remake this map entirely if I ever have the time to do so... I'm not quite happy about the flag bases layout, and the trains appearance could be improved.

Enjoy!