Call #identity on a member without identity authentication record
would throw excpetion, but it is supposed to query and check if it is nil.

e.g. views/private/settings/index is using 'if current_user.identity'
Member#identity should return nil instead of raising
when authentication record does not exist.
move enqueue outside transaction to prevent it cause db rollback
allow api access even user is disabled
block api access from other than trusted ip
Update deploy-ubuntu.md

Added clarification for benefit of those who are following this guide using Ubuntu 12.04 or Ubuntu 10.04. When installing nginx-extras, the command sudo add-apt-repository 'deb https://oss-binaries.phusionpassenger.com/apt/passenger trusty main' is specific to the version of Ubuntu. For instance, under Ubuntu 12.04, the command should be: sudo add-apt-repository 'deb https://oss-binaries.phusionpassenger.com/apt/passenger precise main'
ensure message ack
remove useless check
Refactor and remove bank model
Refactor and move receive bank info from i18n to deposit_channel.yml
Change i18n key from number to account
Cleanup
Merge pull request #138 from peatio/fix-member-identity-nil-error

Thanks!
make Ordering accept multiple orders
fix /orders/multi api bug
Merge branch 'master' of https://github.com/peatio/peatio
Remove useless code
Fixed register page fallback url

Register page should fallback to IdentitiesController.action(:new)
Fix typo
Extract ActiveYaml base class

We use universal config root path.