Merge pull request #6 from INN/webapp-dev

Columns GUI and preview functionality
Merge branch 'webapp-dev' into gh-pages
Merge branch 'webapp-dev' into gh-pages
copyedit and update credits page
put the app description outside of the tabs
Merge pull request #7 from INN/webapp-dev

Multi-tool Readme
Merge pull request #8 from INN/gh-pages

Merging gh-pages back into webapp-dev