Steam update 1.2 released

This is another bugfix release. Changes are:

• Fixed "Invincible Fighter" achievement not being unlocked (win final boss fight without dying)

• Added support for up to 5 mouse buttons (previously 3). All buttons can be assigned in the controls menu.

• Added support for the following game controllers on Windows: Thrustmaster Dual Analog, Logitech Dual Action, Logitech F310, Sony DualShock

• Added support for the following game controllers on Mac and Linux: Logitech Dual Action, Logitech F310

• Fixed support for Wireless Xbox 360 controller on Mac

• Fixed support for Xbox 360 controller d-pad on Mac

• Fixed DPI scaling issues on Windows, which caused the game to be scaled larger than the actual resolution in fullscreen

• Fixed some cases where the Steam leaderboard rank wasn't shown at the end of a level

• Game no longer quits when certain files are write-protected

• Disabled warning when saving game to disk fails, but save to Steam Cloud was successful

• Added more checkpoints in 'The Horrible Moment', 'Unusual Disturbance', and 'Buried'

• Fixed texture of the yellow door

• Adjusted the volume of 'Daktari' during the final boss battle

• System requirements are checked only on first run. This avoids warnings popping up everytime the game is launched.

• Added 64 bit executable on Mac OS

• Spanish and French menu controls texts are no longer mixed up

• Fixed a few rare menu crashes