This is missing component to the recent PR.
I thought that another configuration option for flowdock email notification option brings unnecessary complexity.
Probably the simplest way for users to fix default icons in Flowdock notifications is to just add "Errbit" icon on Gravatar for already existing email from ERRBIT_EMAIL_FROM.
What do you think?
Add Flowdock configuration option
Coverage increased (+0%) when pulling 9d304ec on nfedyashev:flowdock_improvement into 8800475 on errbit:master.
This PR must fix #511