Update README
improve readme
more clarification in README
new line in README
minor tweak to badges
Testing form for failure on nil date entery
added start_date to Cohort model
Reworking tests to pass with validations
Merge pull request #13 from lighthouse-labs/feature/22-add-start-date

Testing form for failure on nil date entery
Merge branch origin/master into feature/30-addDayUnitModel