adding sharing logic (just saving work in progress)
another local commit to share url
progress on share link
revised date validation for url
added full share url share to the template
fixed duplicate entries from share link and tweaked the share interface
fixed whitespace
fix interface actions that should only be displayed to collection admins
refactored settings
updated requirements.txt to pull django_auth_lti from our repo
changing the share url to only allow student access to the collection (per discussion with jazahn and mike)
refactored settings files so that sensitive data like the LTI oauth credentials and django secret key are pulled from the environment instead of hard coded in production
merged dev into bchau_branch
Merge pull request #70 from Harvard-ATG/bchau_branch

feature/share-collection
Merge branch 'dev' into feature/settings-cleanup
changed method of retrieving of sensitive credentials due to env not working as intended
fixed whitespace
fixed issue with debug=false
added example config files
Merge pull request #71 from Harvard-ATG/feature/settings-cleanup

feature/settings-cleanup