V1.3 - FileFighter CLI

FF-98, FF-99 Feature/application (#5)

* Changed a lot.

* Added OneTimeScript

* small fixes

* Implemented Request by @qvalentin (#5)

* Finished Install Script.

* Finished Install Script.

* Added Status option.

* fixed wrong rootDir.

* fixed one edge case.

* removed unnecessary db_port.

* Added FrontendLink to start.sh

* Added FrontendLink to start.sh

* Can i stop pushing pws to the repo?

* Added additional information for the user.

* Updated README.md

* Implemented Changes requested by @qvalentin