added ability to create/accept/reject suggestions them
made commands async, because a lot of operations behave like that
in case the database is needed in an async operation, this needs to be in a separate transactional service
fixed ordering of Long parameters (server > channel > message)
added initial emote handling (no adding of emotes yet)
fixed creation of AUserInAServer, in case the user did not exist yet, when loading
changed PostTargetService to return Futures instead of being a void, in order to be able to act on the message posted
set logging level to debug
fixed help for different commands (templates had wrong naming)
changed command context to be a member instead of user, commands are only supported within guilds
added custom exception templating for the error message
added error message in case the parameters for a command were too little
added support for templates on command help descriptions
added post execution to be executed to print exception messages
refactored command handling to be able to support exceptions
added user and userInServer management
