doc: Add change log.

Manually created.

CHANGELOG.md

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+## [v1.4.0](https://github.com/ldez/gcg/tree/v1.4.0) (2017-05-26)
+[All Commits](https://github.com/ldez/gcg/compare/v1.3.0...v1.4.0)
+
+**Enhancements:**
+* feat: sort lines by label. (by [ldez](https://github.com/ldez))
+* feat: multiple labels exclusion. (by [ldez](https://github.com/ldez))
+
+**Documentation:**
+* doc: add logo and references. (by [ldez](https://github.com/ldez))
+* doc: enhance examples. (by [ldez](https://github.com/ldez))
+
+**Bug fixes:**
+* refactor: use HtmlURL instead of api URL. (by [ldez](https://github.com/ldez))
+
+
+## [v1.3.0](https://github.com/ldez/gcg/tree/v1.3.0) (2017-05-25)
+[All Commits](https://github.com/ldez/gcg/compare/v1.2.2...v1.3.0)
+
+**Enhancements:**
+* feat: add display labels feature. (by [ldez](https://github.com/ldez))
+
+**Documentation:**
+* doc: add display labels documentation. (by [ldez](https://github.com/ldez))
+
+
+## [v1.2.2](https://github.com/ldez/gcg/tree/v1.2.2) (2017-05-23)
+[All Commits](https://github.com/ldez/gcg/compare/v1.2.1...v1.2.2)
+
+**Enhancements:**
+* refactor: add second to current ref date. (by [ldez](https://github.com/ldez))
+
+**Documentation:**
+* doc: add licence. (by [ldez](https://github.com/ldez))
+
+
+## [v1.2.1](https://github.com/ldez/gcg/tree/v1.2.1) (2017-05-21)
+[All Commits](https://github.com/ldez/gcg/compare/v1.2.0...v1.2.1)
+
+**Enhancements:**
+* feat: add 1 second to previous date. (by [ldez](https://github.com/ldez))
+
+
+## [v1.2.0](https://github.com/ldez/gcg/tree/v1.2.0) (2017-05-20)
+[All Commits](https://github.com/ldez/gcg/compare/v1.1.0...v1.2.0)
+
+**Enhancements:**
+* feat: add required fields. (by [ldez](https://github.com/ldez))
+* feat: custom filename. (by [ldez](https://github.com/ldez))
+* feat: put PR number at the beginning. (by [ldez](https://github.com/ldez))
+
+**Documentation:**
+* doc: update documentation. (by [ldez](https://github.com/ldez))
+* doc: add more examples. (by [ldez](https://github.com/ldez))
+
+
+## [v1.1.0](https://github.com/ldez/gcg/tree/v1.1.0) (2017-05-20)
+[All Commits](https://github.com/ldez/gcg/compare/v1.0.0...v1.1.0)
+
+**Enhancements:**
+* feat: add debug mode. (by [ldez](https://github.com/ldez))
+* feat: bold on section. (by [ldez](https://github.com/ldez))
+
+**Bug fixes:**
+* refactor: use Comitter instead of author. (by [ldez](https://github.com/ldez))
+
+
+## [v1.0.0](https://github.com/ldez/gcg/tree/v1.0.0) (2017-05-20)
+[All Commits](https://github.com/ldez/gcg/compare/0.1.0...v1.0.0)
+
+**Bug fixes:**
+* fix output writer. (by [ldez](https://github.com/ldez))
+
+
+## [0.1.0](https://github.com/ldez/gcg/tree/0.1.0) (2017-05-20)
+[All Commits](https://github.com/ldez/gcg/compare/f30aedb...0.1.0)
+
+**Enhancements:**
+* first version (by [ldez](ht.tps://github.com/ldez))