* Changed license from GNU GPL v3 to GNU AGPL v3.
* Added copyright file headers.
* Set formatter and save actions settings and applied it.
* Made a code review.
* Place internal classes in their own file.
* Renamed package from fr.imirhil.april to org.april
* Splitted launcher and CLI.
* change Java version to 1.8

* anonymized Twitter API key
* eplaced Maven with Ant
* no more code injection