Added Invar Armor item textures (Thermal Expansion).
Railcraft GUI update.

Updated broken and misaligned GUIs for loaders, carts and detectors.
Forestry update.

- Updated Forestry tree leaves for vanilla tree species to match JSTR leaves, including a fix for jungle "fast mode" leaves which were incorrect in the JSTR base textures.
- Fixed category numerals on the Beealyzer/Treealyzer GUI.
Updated Thermal Expansion gears.

Better gear item textures matching the Forestry gears.
Merge branch 'Leenhaart/master'