Start to re-implement sound system in vanilla sounds.
This will make us compatible with XU mufflers (when they're) fixed and
reduce unneccesary reinvention of wheels.
More big sound work
Cleaning up unused stuff and 3-space tabs (?)
First attempt at jetpack sounds under vanilla system. Bad.
Pretty satisfactory implentation now, approaching point of being able to merge into 8.0.
Merge branch 'soundsystem' into 1.8

@aidancbrady, I got this working, might need some more refinement but
it's pretty stable
Make the fade-in times match the old Mek sound system, give some things a fade-out of 0.5s because it sounds nice that way.
Found a way to reduce the nasty sound delay when rapidly toggling sounds on and off.
Make SoundHandler static, remove some unneeded stuff.
Remove some deprecation.
Fix config option.
Add lang utility methods to localise FluidStacks, use them throughout the codebase.
Make shift not required to see contents of Portable Tanks.
For convenience of NEI searching.
Make the sound config options apply again.
Fix indent.