Starting the port to Minecraft 1.7

Initial set of very obvious fixes for Minecraft 1.7 port, with
an early version of Forge.
fixed IIcon and IIconRegister names
progress made in MC 1.7 network support
migrated part of the sendTo* calls to the new network API
Merge branch 'marmot' into BuildCraft-5.0.x
made progress with 1.7.2 port
progress with 1.7.2 port
progress with 1.7.2 port
more compilation fixes for 1.7.2
removed obsolete file
Build for latest 1.6.4 Forge version
fixed last compilation errors
fixed biomes conflicts and forge version
fixed facade display and pipe initialization
Merge pull request #1430 from asiekierka/marmot

Build for latest 1.6.4 Forge version
fixed setBlock calls to null
added discriminator for tile update
added missing channel to energy mod
fixed get description packets
fixed pipe state synchronization