New job: post:add-to-rivers .
Use JobInvalid instead of JobFailed for Post::AddToRivers job.
Merge pull request #6 from Libertree/add-to-rivers-job

New job: post:add-to-rivers .
Bump libertree-model-rb re: distribution of springings of posts.
Add "debugger" gem for Ruby 2.0 .
add `introduce` command responder stub
remove obsolete connection module
UNRECOGNIZED SERVER: add exception for `introduce` command
fix message test syntax
implement test for `comment` job
describe purpose of Relay in a comment
Merge branch 'master' into xmpp

Conflicts:
	Gemfile.lock