The "Touch of Alchemy" patch

Still crunching on puzzles for the final chamber, there are ment to be two, one to power up the transfer machine, and one to activate the elevator (and escape).
Not done yet, but in the meantime, we have a small patch for you right here.

# The Laboratory (episode 4)

Instead of the existing puzzle, the new Laboratory can now generate new puzzles of the same sort, increasing replayability of the room.
(all rooms with static puzzles are planned to be upgraded to more randomizable rooms)
The difficulty will be random as well, but the upper difficulty step will be based on number of timed games completed.

# Transfer chamber (episode 4)

- Fixed entrance bug.
- Repositioned room position, added stairwell.

# Prop bank

- New props : a hammer, a calendar and a rake.

# Achievements

- Fixed "True Heir" to be unlocked when all four episodes are completed in timed mode.

# Lighting

- Fixed that at least one lamp in each room will always be turned on.

# Grapics

- Fixed framerate running wild on certain machines.