Removed IdentityBag from Standard-Slack to Messaging-Service because it is only needed for Messaging Purposes
Removed unneeded "use"-Statements
Because of using GitFlow create Alias dev-master to dev-dev (master is only for releases)
Added Feature for Attachments to ChatMessages
Removed unused "Use"-Statement
Fixing awkward Typo in Readme.md
Added Silex-Provider
Merge branch 'release/1.1.0'