Conflicts:
	include/openspace/rendering/renderable.h
	include/openspace/rendering/renderablevolumecl.h
	include/openspace/rendering/renderablevolumeexpert.h
	include/openspace/rendering/renderablevolumegl.h
	include/openspace/rendering/renderengine.h
	include/openspace/scenegraph/ephemeris.h
	include/openspace/scenegraph/scenegraph.h
	include/openspace/scenegraph/spiceephemeris.h
	include/openspace/scenegraph/staticephemeris.h
	include/openspace/util/constants.h
	include/openspace/util/time.h
	src/engine/openspaceengine.cpp
	src/interaction/interactionhandler.cpp
	src/rendering/planets/renderableplanet.cpp
	src/rendering/renderablevolumecl.cpp
	src/rendering/renderablevolumeexpert.cpp
	src/rendering/renderablevolumegl.cpp
	src/rendering/renderengine.cpp
	src/rendering/stars/renderablestars.cpp
	src/scenegraph/spiceephemeris.cpp
	src/scenegraph/staticephemeris.cpp
	src/util/factorymanager.cpp
	src/util/spicemanager.cpp
	src/util/time.cpp

Conflicts:
	include/openspace/util/constants.h
	shaders/pscstandard_fs.glsl
	shaders/pscstandard_vs.glsl
	src/interaction/interactionhandler.cpp
	src/main.cpp
	src/rendering/renderengine.cpp
	src/scenegraph/scenegraph.cpp
	src/scenegraph/scenegraphnode.cpp
	src/util/factorymanager.cpp

SPICE-time dependency, retrieval of spice ephemerides and rotational matrix + coordinate references.

Added functionality:
- New class renderablesphericalgrid is repurposed code from powerscaledsphere class.
  Due to z-buffer issues used as reference grid to confirm planetary orbits are correct.
  This has been a major problem as prior we had no visual reference.
  Now we have a Galactic-, Celestial- and Ecliptic-coordinate grid.
  To this also added separate shader: grid_vs.glsl / grid_fs.glsl
  These grids have a static-rotational matrix derived from partiview (thanks to Brian)
  since spice req. to-from frame to compute rotational matrix.

Time dependency:
- Added struct RuntimeData - which for now only contains openspace time and is passed to all renderables
- All renderables accept runtimeData, keep private reference and use for computation of rotational matrix
- This obviously carries corresponding changes to Scenegraph and ScenegraphNode.

Spicemanager:
- Added function that more easily provides access to rotational matrix used in spice
 (used in renderableplanet for computing planetary objects spin around axis)

Ephemeris-classes:
- Now compute ephemeris from spice based on timeepoch in runtimedata
  TODO: once z-buffer fixed - set ephemeris correctly as meters (not kilometers)

Renderengine:
- Advances time with the advanceTime method in RuntimeData struct

ISSUES:
- Our Y axis NOT same as SPICE or star-catalogue, all renderables rotated now 90deg, needs redefinition,
  lots of debugging and major headaches before this conclusion.
- Depth buffer needs to be fixed in order to properly place planets.
- Spice kernels have finite time-range, when time stops - simulation ends - ugly fix: reset time to zero.
  Possible fix: kernels de431 (part 1-2) cover huge timespan and most likely have functions to extrapolate time,
  drawback is that they are 1,7 gb each.

TODO:
- Compute and draw dynamic ephemeries for each renderable. Either do full year sweep then update for each point or
  create a tail of linesegments for each planet. Dont know yet how to do this, would like spicephemeris to be
  sub-class of Renderable (have own render() method) - good/bad?

Clean up code in various places

Add "isEnabled" flag BoolProperty to all renderables

Added functionality to send Lua scripts over the network

Removed scriptfunctions.h and cpp as the functions have moved into other classes

Fixed bool -> int conversion in SpiceManager

Started change of Time class