Fix for subtitles problem

Hi

This small patch should fix these problems:

• Subtitles for cinematics only showing "aaa..." text.
• Harvesters get inside Mothership when repairing from certain angles.
• A pair of internal bugs that don't get noticed by the players (seen in errors log).
• 21/03/2016: added fix for achievements (Space Patrol and Rebel Fleet).

Sorry for any inconveniences and I hope you continue to enjoy the game.

Regards, Jorge