[Public Beta] Patch for update 1.2

This is a patch for update 1.2, bringing it up from 1.2.7 to 1.2.9. The main focus for this patch being the Achievements.

Changelog:

• Resolved some reported and unreported issues with the Achievements;
• Small improvements to the frame-rate at the start of some levels;
• Minor improvements to stability;

To switch to the Beta branch check out the instructions to access the Beta.
And you can still leave your feedback in the Beta forum!