Patch 176: Exploration mode etc.

Exploration mode:

• Completing Von Neumann missions now lets you reclaim sectors conquered by the von Neumann.
• Added the final mission. More story text and artworks will follow.
• The latest changes to the exploration mode are probably still buggy und unbalanced. I'll work on that next.

Misc:

• Fixed a bug in the enemy selection mechanism.
• Added preliminary Russian localization.
• Added preliminary Brazilian-Portuguese localization.

Bug fixes:

• Fixed some issues related to the clipboard.
• Parts in the clipboard are no longer shown in ship buttons.
• Endless mode ships should no longer overwrite exploration mode ships.
• You should no longer spawn on top of pirate bases.
• AI cores should now work on multi-shippart-ships.