Added tex-related cruft file extenstions to the top-level .gitignore.
	Added conditionals to doc/Makefile to work around school computer's
lack of latexmk.

	Now, if the hostname includes a 'physics.unc.edu', repeated
pdflatex calls are used rather than latexmk -pdf.
	In addition to continued writing of the tutorial, added an
info/attribution comment header to the top of
doc/optimizationTutorial.tex.
	Removed unnecessary items from the top-level gitignore,
since they were included in the global one.
	Added 1) comments and 2) *.pyc to the top-level .gitignore.
	Added 'simulation' (really just 2-d function) file
src/scatter.py.
	Added usage documentation to the src/scatter.py function file.
	Continued writing of doc/optimizationTutorial.tex.

	Just routine saving-my-work.
	Added unfinished implementation of Nelder-Mead method.

	File is src/neldermead.py. At the moment, the file starts
with documentation, then has Fabian's matlab code pasted below
it. Only minor changes (e.g. getting rid of end of line semicolons)
have so far been made.
	Added bare driver program for tutorial exercises.

	File is src/find_best_params.py.