Develop (#49)

* improved exception message when no binary file is found

* no longer uses the `Folder` class

* updated

* fixed

* Develop dependencies (#42)

added tests for lower dependencies

* updated

* come back

* fixed

* fixed

* updated

* little fixes for `BackupManager` and `BackupExport` classes

* test

* fixed typo

* little fixes

* fixed

* updated

* fixed

* added badge

* some fixes

* uses `Filesystem` class

* come back

* fixed

* fixed tests

* updated

* updated

* updated

* APIs are now generated by `phpDocumentor` and no longer by` apigen`

* fixed

* fixed slashs term

* fixed sniffer rules

* fixed

* fixed description

* tests have been optimized and speeded up

* updated

* fixed string for i18n

* fixed

* fixed string

* updated pot template and it translation

Author: mirko-pagliai