initial
whitespace fixed
extract Orbit from StarSystem and display player orbit in SystemView

The Orbit structure from StarSystem.cpp is pulled out into its own
files Orbit.h/cpp, and other orbital calculations are turned into
static functions on that struct.

Orbit struct and calculations are also altered to work for hyperbolic
trajectories.

DynamicBody gains a ReturnOrbit method to compute the orbit of the
body, and this is used to plot the player's orbit in the System View.

Note: This was originally a 15-commit PR from irigi.
I (@johnbartholomew) am squashing it into one commit because the
history is messy but I don't want it to lose irigi as git author.
clean up includes a bit in Orbit.h/cpp
add const versions of Frame::Get{Non,}RotFrame()
SystemView::PutOrbit: don't send unnecessary duplicate vertices
SystemView: const SystemBody, and const-reference params
Orbit: calc_orbit -> FromBodyState; DynamicBody: {Return -> Compute}Orbit

The weird prototype for calc_orbit has been cleaned up into FromBodyState.
FromBodyState is a static method that constructs a new Orbit from the
body state parameters.

DynamicBody's unused internal "orbit" member has been removed.
Merge pull request #21 from fluffyfreak/system-to-lua

Last couple of tweaks.
clean up the interface of the Orbit structure
Orbit shouldn't need to know about the game clock state
make mean/true anomaly conversions in Orbit private
Merge pull request #2154 from shadmar/missile_smoke_trail

Missile smoke trails
Orbit: formatting, efficiency and boundary-condition clean-up
extract common code from TrueAnomalyFromMeanAnomaly and OrbitalPosAtTime
update changelog
Merge remote-tracking branch 'irigi/useful-orbital-parameters'
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into system-to-lua

Conflicts:
	src/galaxy/StarSystem.cpp
MSVC doesn't define atanh or asinh functions until VS2012 C++11, have to define them ourselves so it compiles.
Updated the VS2010 and VS2012 solutions.
Merge pull request #2168 from fluffyfreak/FixVS2012OrbitFiles

MSVC doesn't define atanh or asinh functions until VS2012 C++11, have to...