Bring across the base SpeedLines files from SPP.
Update the Color.h/cpp files with GRAY used by SpeedLines.
Update visual studio projects with SpeedLines files.
Update the Linux makefile too... just because I can :P
Integrated the speedlines.
Added a translation, added a settings entry and added a new string.
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into SpeedLines
Merge remote-tracking branch 'fluffyfreak/SpeedLines' into speed-lines
silence ordering warnings
always do lines in grey. don't show when going too slowly or too close to a planet or station
always create a SpeedLines object and use the current config value to decide if we should use it or not
speed lines off by default
Merge branch 'speed-lines'