add deliver_at column into rewards
use deliver_at field instead days_to_deliver and change the input on form [13539092]
sql to update deliver_at into projects online [13539092]
Merge branch 'master' into feature/change_to_time_input_into_reward_editor-13539092

* master:
  change some links texts on user_menu [13536646]
  added contributions link into user_menu [13485490]
  added refund link into user_menu [13536582]
  ignore rvmrc
Merge pull request #767 from devton/feature/change_to_time_input_into_reward_editor-13539092

Feature/change to time input into reward editor 13539092