Complete Rewrite of Gregtech for version 1.7.10 5.05.07

- moved old textures to 1.7.2_archiv (can be deleted later)
- added new guis from alheimerjung
- added new iconsets for machines by alheimerjung and Bakermanlp
- added new iconsets for items by alheimerjung
- renamed items for folder gt.metaitem.01 and gt.metaitem.02 from older
  versions
- added new Untextured.txt files for gregtech version 1.7.10 5.05.07