Combined and moved files corresponding to the old complex integration
labs. They are now going to be a single lab on residues.
Various spacing fixes for the residues lab.
Added a new solutions file containing the solutions to the new problems
for the new residues lab.
Added a variety of plots to the second complex analysis lab.
Added rewritten version of partial fractions problem in residues lab.
Rewrote the section on using residues to evaluate difficult integrals.
Added a polynomial root counting problem to the residues lab.
Removed solutions files for old complex integration labs.
Added solutions template file for residues lab.
A small spacing fix.
Fixed some typos.
Added some comments and discussion to the surface plot example for a
singularity.
Made a small clarification in the intro to complex lab.
Merge branch 'master' into comp
Merge pull request #503 from insertinterestingnamehere/comp

Residues
Merge branch 'master' into gmres