warning msg "soundscape" removed from log on awake

- removed warning msg in log about "soundscape" folder missing if not
installed (was a safe warning anyway)
cleaning code
- fixed Airlock sound on "switch vessel"

- fixed Airlock sound playing on "switch vessel" to/from EVAed Kerbal
Build 0.6.4 Ready for release
Merge pull request #5 from Athlonic/devBuild

Build 0.6.4 Ready for release