0.9.1 LoS and spawn bug fixed

A couple of bug fixes: 

- A bug with the calculation of visibility between mechs has been fixed. Enemy Mechs no longer shoot through obstacles and behind their backs

- Fixed annoying bugs where either your opponent's or your mechs would not spawn in battle, resulting in instant victory or defeat.

Some small QoL things:

- A couple of new mechs: Vulcan and Annihilator

- Infantry and helicopters no longer break trees in forests.

- Time flows now on the global map,  while you are fighting or resting on the planet. 

- The color of the water on the ocean map has become paler, allowing you to see the radius of movement more clearly.

- The global map now shows who is fighting who in a conflict over a planet instead of just a single “mercenaries wanted” icon.