* Listings creation and update API
- new listings controller
- refactored code to share core functionnality between api and web controllers
- code in common in classified listing concerns
- added tests for index/create/update
- json output as views
- updated a factory
* Listings creation and update API: code update
- refactored json calls
- added test cases
- added pagination for list of listings
- refactored jbuilder files
- typos
* Listings creation and update API: code update
- tags and tag_list in controller
- changed view to display both
- refactored and added test
* Listings creation and update API: code update
- small change to resolve conflit
* Listings creation and update API: code update
- added test case
- deleted unneeded test case
* Add ApiSecret model scaffold
* Add relationships between ApiSecret, User, Organization
* Add placeholder template to account tab
* Add description column to ApiSecrets
* Add very basic access token generation
* Add basic access token deletion
* Show access token on success flash
* Add placeholder message when user has no secrets
* Use cta style on token generation button
* Add presence validation for ApiSecret description
* Add ApiSecrets factory
* Add pundit policy for ApiSecret
* Nest form field within api_secret hash to allow rails strong params
* Use pundit to authorize ApiSecretController actions
* Add error message flash for ApiSecretsController actions
* Add specs for ApiSecretsController
* Add length validation to api secret description
* Flash model error instead of generic message on save failure
* Truncate ApiSecret factory objects descriptions to prevent validation error
* Remove length restriction on ApiSecret.description
* Use darker font color for token creation date
* Consolidate ApiSecret migrations
