adding Tulane presentation
Merge branch 'gh-pages' of https://github.com/AmericanRedCross/presentations into gh-pages
"getting my local branch up to speed"
adding tulane presentation
adding overview slide
modifying overview slide
adding TechChange presentation
adding TechChange presentation slides
updating zimbabwe and techchange presentations
adding speaker notes
finalizing TechChange presentation
finalizing TechChange presentation
one last round of fixes
adding contact details, fixing one map
adding presentation
finializing presentation
Merge branch 'ExplainingOSM' into gh-pages
merging in changes