removing some old figures and other files
update contributors

Add all known contributors to date.
Merge branch 'master' into jarvis
Edits to the generators lab.
Added the Line Search lab.
Trying to fix compilations errors in linesearch.
Re-added a file that was untracked when renamed.
Adding the fixed Linesearch lab.!
replace python idioms lab with lab on standard library
Made lines shorter, switched out $$ for equation* environment.
fixed minor spacing issue in plot legend
minor adjustments to plotting

Made some minor adjustments to plotting script.
Regenerated the pdf files because they wouldn't open (at least on my
system).
make python cleaner

We can re-use code.
Fixed integer mistake.
Some more small fixes to the generators lab.
make imports global
Fixed figure references.
minor changes to layout

Made some very minor changes to the lab that affect the layout.
Inserted linebrakes
layout changes

added linebreaks and some minor adjustments to formatting.
change unnecessary path.