Remove large files

Change pictures in Vectorization lab to be much smaller jpg images.
remove large audio files from FFT lab
remove more big files
more housecleaning
remove unneeded pdf files.
remove large graphics from svd lab

Replace with jpg.
remove more large files
remove large image files

TODO: Need new image.  One that we are assured of having the rights to include (CC or Public domain).
Merge pull request #377 from byuimpact/cleaning

Cleaning out files