[chore]add kaminari gem
[feature]user can invite others via app contact
[refactor]send email to_url_array
[feature]invite users via email
[chore]fix bug that may load twice
[feature]user can delete account
[feature]user can delete account
[chore]user can delete account
[feature]search cards
Merge pull request #246 from peterzd/api_search_cards

Api search cards
Merge pull request #247 from peterzd/dev

Dev