Further code fixes.

Fixed some modifiers and added back the Roots event chain.

Updated for Stellaris 4.0.
The Roots event chain has been disabled until a further update.
The new systems should spawn more freely now, preventing some softlocks.

The start menu is now localized.

Added Spanish localization to the Ziaskehorn event thanks to Darh.
Tweaked solar system generation for new games.
Updated localization of the start menu.

Fixed detection of incohesive origin.

Updated localization.
Added a new mod detection system for increased performance.
Delayed the archaeological events to spread them more.

Fixed scope checks on some events.

Tweaked solar system spawn parameters.

Fixed missing localization for operations.
Added pointers to Strange worlds once they're discovered.
Fixed some precursor events chains that would break if another empire takes control of a new system before you can survey it. The events will now fire if you can get your science ship in orbit of the planet. You'll still need to be able to excavate the dig site though, but it's nothing war can't solve.