Major Refactorization

I did a major refactoring of both the code and the repo.
Changes:
Moved Block initialization and registration into AlexBlockLoader.
Moved Item initialization and registration into AlexItemLoader.
Moved Crafting Recipe Registration into AlexCraftingManager.
Replaced .class files with .java files (most eclipses don't work with
.class files, so I changed it to .java for compatibility).
Removed the .jar file (the .jar file has to be a seperate download, not
in the repo).
Added the rest of the Base Supplies Sprites
Base Alchemy Supplies Part 1

Moved alex folder to under tutorial.
Added AlchemyItem class and BackpackAlch class.
Base Alchemy Supplies Part 2

Added the rest of the Base Alchemy Supplies. Note: The Rifle does not
work.
Merge pull request #3 from gutza1/master

Major Refactorization