Rework side fairings and jettison behaviour

[sumghai]

Forum user Bomoo noticed there was a gap when two side fairings were mounted onto the Service Module:

http://images.akamai.steamusercontent.com/ugc/261587080048769047/ADD009943D8FB6019D466CCCD4C674E981C3D810/

I suspect this came about from the collider rework, and at the time I was trying to avoid explosions from intersecting fairings. But perhaps I can just move the visual mesh to line up properly.

[sumghai]

Bomoo confirmed the commit fixes this issue.

Closing.

[sumghai]

Aforementioned fixes failed regression testing (#95), and requires rework.

[sumghai]

The fairings need a fundamental rework, and so I've renamed the issue.

[sumghai]

Taking a page from forums user Sobol's SLS pack, I've reworked the side fairings as follows:

• Fairing panels have 1/3rd rather than 1/2 coverage of the Service Module circumference, resulting in "flatter" panels that should reduce collisions
• Panels now include jettison motors that automatically activate when staged, with enough thrust to push them out of the way cleanly in both atmospheric and orbital scenarios
• Panel decouplers now set to zero force as the jettison motors do all the work pushing them away

[sumghai]

Bomoo confirms new side fairing behaviour works as intended.

This is good to go.