Modmail 1.0

Error handling (#77)

* added function to delete message via message id

* edit and delete now updates all_message_attachments

* added help command execution on error and moved error handling to one file

* forgot foward.error

* forgot to remove debugging error

* Wrong indentation

* typo fix

Modmail 1.0-rc2

added function to delete message via message id (#75)

* added function to delete message via message id

* edit and delete now updates all_message_attachments

Modmail 1.0-rc1

Addmodmailcategory (#55)

* All message logger. Seperation of attachments to none-logs-table

* bugfixes from qube

* addmodmailtocategory