Update to v1.12.18.b

v1.12.18.b - Release b
December 3, 2013

- Added parts from the following mods into TechTree:

ECLSS Life Support
Hooligan Labs Airships
Hull Camera VDS
Ioncross Crew Support
PBW Fuel Balancer
RLA Electric Engines
RLA Power Generation Parts
RLA Stockalike Parts
Sceppies Minipack
Service Module System
Space Shuttle Engines
Stretchy Tanks
TiberDyne Space Shuttle Systems

- Science Costs Overhaul
- TechTree nodal structure revised