Fog of war update

Hi!

I've had a short break from developement after publishind The Forestation here but yesterday decided to continue for a little bit more so expect a few more updates in the following days.

Yes, just as the title says I added fog of war and that is the largest change made from last update. It behaves in a quite standard way I'd say. There are two types of fog that are introduced in this update - thick fog and light fog. Thick fog is what covers the entire map initially and does not allow to see neither terrain nor units that are under it. Moving units into areas covered by thick fog will remove the fog permamently. Every unit and building has now a parameter called vision range that states how far from it the fog gets removed.

The light fog will be present in areas that were discovered in the past (there is no thick fog anymore) but are now not visible to player (no unit stays near that area). This type of fog allows to see terrain but not enemy units. I added new screens to the game page that show how the game looks like after adding fog of war.

One more thing worth mentioning that was added is the quick fix to game UI being broken on lower resolution screens. I tested the game only in FHD resolution during developement and completly abandoned the fact that there are multiple screen resolutions - won't make this mistake anymore. Now the UI should not break regardless of resolution.

There are some other changes introduced like lowering click sound volume but these are rather cosmetic. The download files are updated and include all changes