removed invalid annotations
added puma deploy script
leader board ranking, same exp, first come first
fix initial exp_upadate_at value populate
Merge branch 'master' of github.com:Coursemology/coursemology.org into dev/raymoond
mission dependency and mission file submission option
fixed exp awarding bug
fix for stats page crash when a user with achievement is deleted
achievement locked icon preference
paging preferences for most tables
sidebar badge for No. of enrol requests
fix for annotation summary bug