Update WSSSPE1_summary_report.tex

Nancy's introductory work in the communities area.
Update WSSSPE1_summary_report.tex
Update WSSSPE1_summary_report.tex
Makes the path to tex executables configurable.
Merge pull request #3 from hlapp/makefile-tweaks

Makes the path to tex executables configurable.
Update WSSSPE1_summary_report.tex
more work in sustainability section (8)
bullet list of what we want to discuss in use-cases
more work in section 8 - defining sustainability
Update WSSSPE1_summary_report.tex
more work is sustainability section - still in progress
fixing order of attendees in a way that should be easy to add new people later
Update WSSSPE1_summary_report.tex
finishing merge in communities
finished first draft of cross-cutting section
removing old file
fixing typo, mainly for commit message testing
small change to test final commits
Section 3 Keynote: turn URLs into a references
Merge branch 'master' of https://github.com/danielskatz/WSSSPE