* Added files for menus
* Added end menu and start menu
* Added pause menu
* Changed gravity and influence a bit
* Made menu elements relative to size of canvas
* Added planet info and player info on a hud
* Added commands help and objectives on hud
* Added objectives on HUD + reviewed reviving of planet (now with delay)
* Added music and music control
* Corrections on key binding + corrections on hud commands help
* Reducted indicators
* Added toggle for radar + background for commands help in hud
* stuff
Merge branch 'Features/menus' into develop