Sunday fixes

This is a bugfix patch that introduces several fixes.

Fixes:

• Technology: Removed a problem where getting a new technology from forebear ruins could remove already unlocked upgrades from your tech list (if the new technology shared upgrades with an already invented one)
• Tasks: "Explore designated area" and "discover N planets" tasks should now correctly complete even when this happens during your last action before the game ends.
• Audio: It should no longer be possible to get multiple music tracks to play on the endgame screen when completing tasks in the last turn.
• Endless: The "laboratory types" information was missing from the science tooltip in endless mode. It should now be there (for newly started games)
• Machine Sentience: another round of fixes to make it work better with structures, this time for ascension gates and labs

Other:

• The main menu now offers a link to the game's Reddit community.

Version numbers are now 'v1.0 (b681)' for Windows and 'v1.0 (b682)' for Mac.