Add float behavior to options.
Add spawn density option for configurable number of zombies.
Added move_liquid

Not a permanent fix for handle_liquid, just more flexible. I'll come back and work on handle liquid, as we need something for liquid movements where the water source is infinite.
Update header file for move_liquid
Commented
Updated siphon
Updated bool
Applied siphon time
Set floating point option output to fixed for better display.
Const some methods at random.
Allows easy container filling from kitchen unit

May be redundant from siphoning, sure, but container filling seems like a missing feature.
Fixed retarded mistakes
Fixed more stupid mistakes; All set
Added ice labs. Currently identical to regular labs, except color
Added ice lab to mapgen. No difference between it and regular labs yet
Added monster group template GROUP_ICE_LAB.
Added bool to check if I am in an ice_lab
Added get_temperature() function to differentiate between outdoor and indoor temperature
Made appropriate changes to use get_temperature() function
Changd get_temperature function to make more sense