Merged jeffs Bandit labs
Included a newly expanded conjugate gradient lab.
Added solutions file, new figures, new problem in the lab.
Fixed typo caught by student.
Fixed typo found by student.
Fixed some minor typos, made other small changes to the scipy.optimize
lab.
Fixed another little error.
Changed 'optimization' to 'optimize' where appropriate, specified x0 in
the second problem, put a negative sign in Newton's law of cooling, fixed
the solution tester for problem 3, removed the extraneous third column in
heating.txt.
Merge pull request #442 from abefrandsen/scipyOptimize

Several small edits to the scipy.optimize lab.
Merge pull request #435 from AZaitzeff/bandit

Merged jeffs Bandit labs
Merged the PRNG lab
Merge pull request #443 from AZaitzeff/prng

Merged the PRNG lab
Merge pull request #441 from abefrandsen/newLineSearch

Fixed typo caught by student.
Removed $$ in favor of \[\].
Merge pull request #439 from abefrandsen/conjugateGradient

Conjugate gradient