Implement modal for help
Add spacing between clusters
Merge from upstream to fix export modal

Merge branch 'master' of https://github.com/woolly-bear-caterpillars-2014/threeSentences
Merge to fix export button and add help modal
Add/style help modal and change focus style on tour buttons
Merge branch 'master' of https://github.com/woolly-bear-caterpillars-2014/threeSentences
Merge pull request #90 from jwag789/master

Create/style help modal and change focus styling on tour buttons