Pocket Edition v0.8.0 alpha/Creative inventory

This will either be copy-pasted on-to 0.8.0 once the rewrite is done, or made a sub-page of it due to technical restrictions. I guess we'll see which one happens when the time comes.

This is how the creative inventory was organized in Pocket Edition v0.8.0 alpha. Blocks and items that were not in it in 0.7.6 are colored green. Blocks and items that were not officially implemented before 0.8.0 are colored purple.