added plot of laplace solution
add plot of asymptotic curves
spelling corrections

Removed forceful placing of figures.  It messes up the spacing.
renamed file to correct spelling
remove leftovers of merge conflict
Merge pull request #235 from ayr0/exposition

added figures
corrected grammar

Reverse a careless change that I made.  No more editing at 2:00am. :)
Merge pull request #236 from ayr0/corrections

corrected grammar
revised image captions in the change of basis lab.
Merge pull request #237 from insertinterestingnamehere/typos

Revised image captions in the change of basis lab.