Changes to the Sun :
* Changed the way the sun was orbiting around the station (or is it the other way around ?), based on real time rather than an inaccurate ticks counter.
* The sun can now be up to twice as fast or slow as standard rotation (1h)
* The sun start with a random angle to the station at round start
* The sun can rotate clockwise or counter-clockwise

Changes to Solars :
* The panels calculate the shortest rotation to get from their position to another.
That also fixed the bug where the panel would backtrack all the way when finished a full rotation (e.g 355° to 1°)
* The exposition to the sun of a panel is now correctly calculated (fixed the bug, where
if the sun was, for example, at 1° and the panel at 359°, no light would arrives to the panel)
* Corrected the timers for the timed rotation.
* Panels made with reinforced glass now have the double of health
* tweaked the solar update method to be more accurate
* added a check for the midnight rollover of timeofday
* the manual tracking orientation is now synchronized with the sun position update
* now checking if the solar panel/tracker/computer is not already in the solars_list before adding it
* added a message noticing the beginning of a solar panel/tracker deconstruction
* tweaked the manual tracking for better accuracy : the orientation is increased/decrease internally and updated altogether the sun.
* sun and solars now uses world.time instead of timeofday,
* the solar panels are now rotated instantly instead of slowly do it every tick,
* code cleaning
Merge pull request #3453 from Menshin/Sun_and_solars

Sun and solars