Included a tutorial on PyWavelets, a new image, and a plotFigs file.
Removed redundant material presented in the previous Wavelet lab.
Took out a section of the WaveletApps lab. Added an image.
Added a solutions file. Fixed a couple of errors in the lab.
Added a simple example, then I got rid of everything with integers
Merge pull request #402 from AZaitzeff/optim

Added a simple example, then I got rid of everything with integers
Merge pull request #398 from abefrandsen/wavelet

Wavelet
Merge pull request #399 from abefrandsen/beamBuckling

Added a solutions file. Fixed a couple of errors in the lab.
Merge pull request #405 from insertinterestingnamehere/cheb

First Chebyshev lab
Merge pull request #407 from insertinterestingnamehere/cheb

Fixed plotting file for first Chebyshev lab.