* [45: Allow to define tags on short codes, to improve filtering and classification](https://github.com/acelaya/url-shortener/issues/45)
* [7: Add website previews while listing available URLs](https://github.com/acelaya/url-shortener/issues/7)
**Enhancements:**
* [57: Add database migrations system to improve updating between versions](https://github.com/acelaya/url-shortener/issues/57)
* [31: Add support for other database management systems by improving the EntityManager factory](https://github.com/acelaya/url-shortener/issues/31)
* [51: Generate build process to paquetize the app and ease distribution](https://github.com/acelaya/url-shortener/issues/51)
* [38: Define installation script. It will request dynamic data on the fly so that there is no need to define env vars](https://github.com/acelaya/url-shortener/issues/38)
**Tasks**
* [55: Create update script which does not try to create a new database](https://github.com/acelaya/url-shortener/issues/55)
* [54: Add cache namespace to prevent name collisions with other apps in the same environment](https://github.com/acelaya/url-shortener/issues/54)
* [29: Use the acelaya/ze-content-based-error-handler package instead of custom error handler implementation](https://github.com/acelaya/url-shortener/issues/29)
* [39: Change copyright from "Alejandro Celaya" to "Shlink" in error pages](https://github.com/acelaya/url-shortener/issues/39)
* [42: Make REST endpoints that need to find something return a 404 when "something" is not found](https://github.com/acelaya/url-shortener/issues/42)
* [35: Make CLI commands to use the same PHP namespace as the one used for the command name](https://github.com/acelaya/url-shortener/issues/35)
**Bugs**
* [40: Take into account the X-Forwarded-For header in order to get the visitor information, in case the server is behind a load balancer or proxy](https://github.com/acelaya/url-shortener/issues/40)
* [33: Create a command to generate a short code charset by randomizing the default one](https://github.com/acelaya/url-shortener/issues/33)
* [15: Return JSON/HTML responses for errors (4xx and 5xx) based on accept header (content negotiation)](https://github.com/acelaya/url-shortener/issues/15)
* [21: Allow to filter visits by date range](https://github.com/acelaya/url-shortener/issues/21)
* [22: Save visits locations data on a visit_locations table](https://github.com/acelaya/url-shortener/issues/22)
* [20: Inject cross domain headers in response only if the Origin header is present in the request](https://github.com/acelaya/url-shortener/issues/20)
* [11: Separate code into multiple modules](https://github.com/acelaya/url-shortener/issues/11)
* [18: Group routable middleware in an Action namespace](https://github.com/acelaya/url-shortener/issues/18)
**Tasks**
* [36: Remove hhvm from the CI matrix since it doesn't support array constants and will fail](https://github.com/acelaya/url-shortener/issues/36)
* [6: Remove dependency on expressive helpers package](https://github.com/acelaya/url-shortener/issues/6)
* [30: Replace the "services" first level config entry by "dependencies", in order to fulfill default Expressive name](https://github.com/acelaya/url-shortener/issues/30)
* [9: Use symfony/console to dispatch console requests, instead of trying to integrate the process with expressive](https://github.com/acelaya/url-shortener/issues/9)
* [8: Create a REST API](https://github.com/acelaya/url-shortener/issues/8)
