Merge pull request #16 from ehetland/master

merging eric's changes to the intro into that branch on my repo
Merge pull request #17 from ehetland/master

edited through "Calculations of tectonic stress, ..." sections
Merge pull request #18 from ehetland/master

all but conclusion section
committing manuscript revisions before merging hetland's updates
saved minor branch changes so that I can merge w/ hetland
Merge pull request #19 from cossatot/hetland

merging hetland's changes into master
work on manuscript post hetland, some figure updates
made figure changes and cleaned up some extraneous files
almost done with edits
done with manuscript pre-Hetland's final edits
Merge pull request #2 from cossatot/master

pull request to merge richard's incorporation of eric's edits