Example mod. Pahitree.

Conformed directory tree to Pahimar's setup
Made fully working example mod.
Important files are:
    Mainclass
    ClientProxy (from havvy's generic mod tutorial on forge wiki)
    DefaultBlock (semi-important)
    Model
    And of course whole cz.skore13.renderLib package.
Changed:
  Textures:
    1) cheaper for same-textured Shapes
    2) allows usage in shapes other than cuboids (up to 256 sides: uses char to iterate array: easy to change if you need tell me)
  Renamed CuboidModel to CuboidShape which makes more sense.
  Renamed Dimensions to DoubleVector3D

Signed-off-by: skore13 <skorepa.jakub@gmail.com>