Version 0.4.2

Changelog

• Added multicast option to request node (#24)
• Updated dependencies
• Errors that occur during the parsing of JSON payloads of reponses are now catched
• Fixed localization for en-US (#28, thank you @zinen!)
• UDP6 agent in CoAP server is now turned off by default to avoid issues on systems that do not use v4/v6 hybrid sockets
• Changed color schema of nodes to orange to make them more distinguishable (#31)