Kerbal Space Program v0.18

This particular release is a very important milestone in KSP development, as it marks the completion of the Sandbox. The most notable features for this release include:* DockingConnecting vessels together is now possible! Build space stations, surface bases, or assemble huge spacecraft in orbit. * Flight PlanningGetting to other planets and moons just got a lot simpler. Place maneuvers along your orbit to create a flight plan, and then just follow the guidance cues. No need to figure out angles or hold a protractor to the screen!* Action GroupsA new way to control your ships! Instead of having everything done through staging, you can assign parts to groups that are controlled with a keypress. Set up Abort systems, or rig up complex contraptions. Or just let the game handle it automatically.* New Resources SystemWatching fuel drain has never been so much fun! New resources allow for completely new possibilities. Energy, Fuel, Oxidizer and other resources now flow through your ship. Manage them as you fly, and pump them across parts.* MusicKSP now has its own soundtrack, featuring many cool tracks, from smooth jazzy tunes to build ships by, to wondrous spacy themes as you explore the solar system.* Performance TweaksNew terrain optimizations and a system to prevent lag by slowing the simulation make for a significant improvement in performance.