TrenchBroom support

Adds TrenchBroom Support
Catches more transparent materials
Fixed .tga out dir expecting working titanfall folder to be inside MRVN-radiant install

v1.0.0

Batch converts .vmt & .vtf -> .tga & .shader files for MRVN-radiant
Instructions in README.md
Tested with Python 3.8 & 3.9

Troubleshooting:

• did you extract the materials/ folder from either Titanfall .vpk or Titanfall: Online .pkg files?
• did you launch MRVN-radiant and set the game to Titanfall: Online?