set files list in atlas.json
Edited #presentation.html
Merge pull request #1 from oreilly-media-content/steve

Put signup javascript in separate .js file and include with <script> tag
adding multicolumn grid
adding layout back in
merging
set files list in atlas.json
removing layout override
Merge branch 'master' of github.com:nelliemckesson/atlas-tips
adding responsive css
Merge pull request #2 from nelliemckesson/master

Adding some css to make things more responsive
Merge branch 'master' of github.com:odewahn/introducing-atlas into nellie
Merge branch 'master' of github.com:oreilly-media-content/introducing-atlas
cleanup