Created/implemented first iteration of the Chemistry Workbench

Added the Chemistry Workbench block, and all of the various class files
required.  Also setup the directory structuring for future GUI based
blocks.  The block itself only has 3 recipes right now, which are the
standard paper and book recipes.  The new recipe is a 2x2 box of dirt
yielding 1 cobblestone.  Next step will be to see if NBT Tag data can be
read by the recipe comparing method, so that all the different types of
chemicals can be "stored" in a single item (will be itemFlask,
eventually).  Might need to make a utility block that can modify NBT Tag
data for beta-testing purposes.  All ChemiCraft related recipes will
most likely wind up using this bench, with the exception of the
Chemistry Notebook, in order to avoid potential conflicts with other
mods using the vanilla workbench.  New recipes are added in the
CraftingManagerChemistryWorkbench.java file under the private
CraftingManagerChemistryWorkbench() class (follow the demo recipes, and
only add between the two comment lines).

Add:

  chemicraft.inventory directory
  chemicraft.item.crafting directory
  chemicraft.client.gui.inventory directory

  BlockChemistryWorkbench.java
  ContainerChemistryWorkbench.java
  CraftingManagerChemistryWorkbench.java
  GuiChemistryWorkbench.java
  GuiHandlerChemiCraft.java

Change:

  modChemiCraft.java
  -Changed to register the new Chemistry Workbench

  en_US.lang
  -Changed to display Chemistry Workbench name properly
  
  BlockPlatinumOre.java
  ItemChemistryNotebook.java
  -Minor tweaks to keep formating consistant between files.