1.7 - Setup commands and support up to 1.15.x

• Includes support up to 1.15.x
• Adds new sub commands to add and manage packs as well as assignments to /wrp and /brp respectively. (addpack <name> <url>, pack <pack> [url|hash|format|restricted|permission], listassignments, deleteassignment <assignment>, assignment <assignment>, globalassignment)
• Add /resetpack command to send the empty pack
• Add MineDown support
• Add multi language support. All messages are now configured in language-depending language files in the languages folder
• Add regex world/server filtering with the regex key
• Add ProtocolSupport and ViaVersion support
• Lots of other smaller fixes and changes