Add some new folders and files to .gitignore
Add some new folders and files to .gitignore

* New: /config/, /logs/, /mods/, /platforms/forge/eula.txt
* Added a / to all files and folders in the platforms directory, so that
it is clear that the path starts from the root directory

Ezoteric/TerrainControl,LinkBR/TerrainControl,PG85/OpenTerrainGenerator,whichonespink44/TerrainControl,MCTCP/TerrainControl