* Scout won't be built when research "Scientific Theory". Fix the word "Can only build water units in coastal cities".
* Fix the bugs when you delete all maps close button disappears and you can't go to main menu.
* Basictests don't check that Scout can't upgrade.
* If the unit is obsolete it will remove from construction queue.
* Basic spectator functionality.
Added as a separate nation with full visibility.
* Robots not allowed to spectate :(
* Allow multiple human spectators
* Multiple spectators allowed.
Fix crash when max players in map editor.
* At least one active (not spectator) human player needed
* - Invisible tiles vision for spectators.
- Minimum 1 active player (Human or AI) to start the game.
- temporary only 1 spectator in game
* Revert "At least one active (not spectator) human player needed"
This reverts commit d843bebe
* Add all tech to spectators for resource view
* Spectators couldn't be rolled out from "Random" civ
* Spectator is not a MajorCiv.
corrected random pick
* Small refactor
* No diplomacy button for Specators
* Add fixes from yair210 review.
