Unstitched: DenPipes, Power Converters. MFR filename fixes.

DenPipes 
- Unstiched and converted from Valve Pipes. DenPipes and DenPipes-Emerald are complete. DenPipes-Forestry has pretty much nothing.

Power Converters:
- Unstitched from 1.4. The sheet included several unfinished textures, namely the UE, Factorization and Steam converters.

MineFactory Reloaded:
- Fixed incorrect filenames on most of the textures, moved them to the correct folder.