Sifter support appears.
An clarifying comment.
Updated the Sifter service docs.
Merge branch 'sifter' of github.com:nextupdate/github-services into sifter
add simplified JazzHub services, will replace RationalTeamConcert eventually
modified the API so that it sends the raw commit message to Freckle for further processing
renamed user to author_email
Improve IRC steps
Properly handle it when override URL is not filled in.

Also, update docs to drop a typo and reword.
support pull_request_review_comment event on irc service
support commit_comment event on irc service
oops
changed the 'date' field to 'timestamp'
Trim spaces
Merge remote-tracking branch 'solanolabs/master'

Conflicts:
	lib/services/tddium.rb
Merge pull request #619 from camelmasa/trim-spaces

Trim spaces.
Merge pull request #618 from soh335/feature/irc_pull_request_review_comment

support pull_request_review_comment event on irc service
Merge pull request #615 from dideler/patch-1

Improve IRC steps
Merge pull request #617 from soh335/feature/irc_commit_comment

support commit_comment event on irc service
Update docs, fixes #548