Initial commit -- analysis scripts.
New script for analyzing sink data output by gadget.
	new file:   sinks.py
Restructured gas_phase.py to use the pyGadget package.
Added some comments.
	modified: gas_phase.py
Restructuring sinks.py to use pyGadget sinks module.
	modified:   sinks.py
updated to work with latest version of pyGadget.
new script morphology.py for making image of density structure (2D)
Changed sinkdat path to work on r900
	modified:   sinks.py
Moved static values outside of for loop.
	modified:   morphology.py
Completely new visualize.py script.
	modified:   visualize.py
visualize.py -- checkpoint.
Have a quasi-usable visualization script.
Desperately needs to be sped up!!!
	modified:   visualize.py
Minor code optimizations and bugfixes.
	modified:   visualize.py
Fixed sink pressure unit conversion.
	modified:   sinks.py
Successfully parallelized density mapping.
Next up: weave inline c++ code.
	modified:   visualize.py
Parallel performance optimizations.
	modified:   visualize.py
Memory optimizations for parallel performance.
	modified:   visualize.py
Updating to use weave.inline
	 modified: visualize.py
Properly formatted visualize image file.
	modified:   visualize.py
temporarily made serial to debug weave.
	modified:   visualize.py