Updates/consistency fixes for opening section
Fixed Kruskal's example, converted psuedocode description into algorithm
format, added helpful function to problem 1, expanded networkx description
and fixed problem 2, general edits for consistency and clarity
New solutions file and edited image segmentation section; problems 3 and 4
still need editing (mostly hints) and the solutions file is incomplete
Fixed some minor things in the Correlation/Cov lab, inserted a section on
Covariance, added a problem, updated solutions file accordingly.
Added an additional comment to the corr/cov lab explaining the importance
of the covariance matrix.
Added section on LSI and information retrieval. Still need to write the
problem.
edited lab
Fixed the 1D wavelet transform example in the lab to have an array of
length 1024 rather than 1000, since the implementation works best on
arrays of length 2^n. Adjusted plotting file and plot accordingly.
Merge pull request #732 from abefrandsen/wavelet_fbi

Fixed the 1D wavelet transform example in the lab to have an array of
Merge pull request #731 from rachelwebb/FiniteDiff2

FiniteDiff editing pass
Relocating labs (1/2)

Removing Algorithms/Applications distinction.
Relocating labs (2/2)

Relocate Application labs to new Labs folder
remove forced figures

make variable assignments consistent
Update paths (1/4)

Update paths in Vol1
Update Paths (2/4)

Update paths in Vol2
Update Paths (3/4)

Update paths in Vol3
relocate Finite Element lab
relocate Spectral labs
Update Paths (4/4)

Update paths in Vol4
cull old labs from volumes