Add mailgun email fixtures
Add mailgun email end point stubs
Trim fullname
Remove useless JSON.stringify

and flatten nesting
Create new tickets from emails #101
upgrade superagent
Revert "upgrade superagent"

This reverts commit 055c2862d1e1be55ec7c9991d4e6d9df3cc1da8a.
Move attachment stream writing to Comment model
Extract stream methods for Attachment model

Attachment#writeStream() and Attachment#readStream()
Add attachments support for new tickets #101