First commit of unwind
Give code a respectable name: unwind
Extend the Polylog NB to accommodate slightly larger chi values
Clean up some of unwind.c, add .gitignore
Add some header text to the Makefile
Update mathematica notebook and tables
Write some code to allow code restarts
Add reheat criterion to main
Mess around with restart stuff
Merge remote-tracking branch 'marge/master'

Conflicts:
	unwind.c
Improve polylog lookup and make windowsize more robust
Fix mistake of adding future collision in Sx
Disable better polylog lookup for debugging performance, add time output
Make some excellent changes

1. Shorten Marge's implementation of faster polylog lookups

2. Fix the linear increase of runtime by limiting kernal domain to the
   integration window

3. Find that solution is independent of step size between 0.1 and 0.03,
   until after the reheating stage. The solution becomes chaotic and
   sensitive to step size when gamma gets very close to 1, but there is
   some evidence that the equations are trying to prevent unphysical
   gamma's.