Update log

A few more updates to Portal labs! 

• The rain was becoming a bit tiresome. It rains a lot here in Blighty and I for one don't need a reminder of it, also the player needs a distinction between inside areas and outside areas, so rain is now limited to outside levels.
• There was a bug with both the hostage and the enemy, where they would both oscillate when near to the player. Thats now fixed (I think) .
• I need to build on the mechanics within the game, so I added a secret area (no secret to pick up) and a conveyor belt.