Started integrating my Chemistry mod into AITS

Added the following packages:
aits.chemistry
aits.chemistry.blocks

Added the following files:
Chemistry.java
BlockCarobiiteOre.java
BlockCinnabarOre.java
BlockLeadOre.java
BlockPlatinumOre.java
BlockSaltOre.java
textures/chemistry/blocks.png
textures/chemistry/items.png

modified the following files:
.gitignore
AITS.java
RegConfig.java
ClientProxy.java
CommonProxy.java