Merge pull request #2 from bdurkee/master

suggested changes and new section
Update .gitignore

"going to sneak in some addition git ignores. Blair, your recent push revealed that the inferior Window version of latex generates some metafiles with different extensions that we don't really need to track. So I've just added them to the list so we don't track em."
Update .gitignore

Not ignoring the .pdf files makes merging/rebasing difficult (since git will always fail to merge them --- I mean .. they're .pdfs!)
testing no pdfs
Delete treewalk01.pdf
another test
uh
appendices added
my stuff merged.. I have some translation pictures I haven't added yet
progress to related work section
Update .gitignore

Removed .pdf from the gitignore list... I forgot that our images wouldn't get pushed if told git to ignore .pdfs!
added figures and their sources.