small edits to basic r bootcamp
started to do small edits
Merge pull request #118 from teamleada/Brian_titanic_branch

Brian titanic branch
Add placeholder to email form
Return after redirect back so it doesn't error. Closes #98
Merge pull request #119 from teamleada/mark/submit-error

Return after redirect back so it doesn't error. Closes #98
Add submit partial
Move submit button to a partial
Small button fixes for the main page
Add rankings to the leaderboard, fixes #122
Merge pull request #123 from teamleada/mark/rankings-on-leaderboard

Rankings on the leaderboard
Merge pull request #121 from teamleada/mark/project-submit-btn

Submit button on project page
Add error checking for csv. Fixes #120
Check only filename
Merge pull request #124 from teamleada/mark/submission-csv

Submission must be CSV
Add previous_step option for content
Add example of previous_step
Display previous_step title
Merge pull request #125 from teamleada/mark/end-of-steps

Previous step
Remove the cover page on the step slides