First pass at NearFuturePropulsion Engines

Added the easy to find ions.  Will keep going on MPDTs and PITs.  Got
the VASIMRs working at correct thrust and ISP, still need to figure out
fuel in 'variableISPEngine'.
NearFuturePropulsion Engines

Updated configs for most NFPP engines.  Three categories:
Actual flown engines - Marked as RSSROConfig = True, description, mass,
all updated.
Test Articles - When actual flight devices that haven't flown yet, but
are otherwise flight-ready, marked as RSSROConfig = True
When haven't flown yet, and flight hardware is not ready, left as
RSSROConfig = False, otherwise added stats.
Future, pie-in-the-sky configs (MPDTs, PITs, etc) The current stats are
spot-on to the theoretical predictions except the thrust is off by a
factor of 1000.  Updated the thrust values, left marked as RSSROConfig =
False, everything else untouched.

Recommend using the OrbitManipulation mod for this, will test these out
prior to submitting the pull request.
Update to NFPP

Added support for NBody Ion Engine during time warp.  Updated VX100, and
P5-1&2
NFPP

Minor fix, caught a case of inaccurate labelling.
Merge pull request #39 from Felger/master

Near Future Engines Support