Attachment support

[mastercoms]

Slack has support for advanced messages using attachments. We should implement this.

[Dude17172009]

That would be great, especially if the console was integrated, we could set the color to the color of the log message.

• Chat: Grey
• Info: Blue
• Warning: Yellow
• Severe: Red

[mastercoms]

Using the power of the new super cool advanced SlackMessage object, attachments can be made.