better handling of background-service: lan-mouse can now be run without a gui by specifying --daemon as an argument. Otherwise the servic will be run as a child process and correctly terminate when the window is closed / frontend exits. Closes #38
* port changing functionality * add portchange to cli frontend
* removed redundant dns lookups * frontend now correctly reflects the state of the backend * config.toml is loaded when starting gtk frontend
Major Update: Functional GUI Frontend!
