Update FrozenMod.java

Change how creative tabs are set up :-)
Create FrozenBlocks

Added new creative tab change name if you want
Create FrozenItems

Another creative tab change name if you want XD
Create FrozenSpawnEggs

worked on creative tab
Added Purple ice

Not providing the texture i made yet.
Create PurpleIce

Still figuring out how to make give it props of ice
Create OlafModel

Gold your going to need to fix this a bit and add all the other files for it. :D
Merge pull request #1 from zeldanerd/master

Creative tabs