Updated for 1.5.2, added Redpower blocks

Added the Basalt, Marble and the standard square lighting blocks from
Redpower, using the same default ID.
If you want to update to 1.5.2, you can throw this in (amongst other
mods) to replicate all of redpowers features. As far as I know, I'm the
only one who matched the IDs (but this means your marble, basalt etc
will stay in your world when you update!)
NO GENERATION YET! NO RECIPES YET! I did add a few more marble-based
blocks though.