Revert "Set up genesis block"

This reverts commit b5df8bfbd67ece63378ccf9948a1c0652f24e42b.

I'm going to try starting from scratch to get a valid block.
Taking another stab at creating a decent genesis block
Added pubkey from main.cpp to alert.cpp
Added code for generating genesis block if we don't have one yet

Also set initial Merkle Root to 0x, genesis block to 0x, and nonce to 0.

THIS NOW GENERATES STUFF. Finally.