Disable rubocop/AccessorMethodName for get_binding
filter -> whitelist

Signed-off-by: Derek Richard <drichard@pivotallabs.com>
Allow commenting when the requester is whitelisted

Dredd will comment on the pull request to reaffirm the whitelisted status of
the requester with the provided template if a whitelisted_template
configuration option is provided.

Signed-off-by: Derek Richard <drichard@pivotallabs.com>
Handle ActionWhitelist within WhitelistedCommenter

When the action of a pull request is not in the enabled_actions list a comment
would have been made in the affirmative when it should not have been.

Previously, the logic inside ActionWhitelist was inverted such that it would
return false when the pull request's action was in the list of enabled_actions
(if they were defined), which is confusing and leads to the aforementioned
bug now that affirmative commenting is an option.

Signed-off-by: Derek Richard <drichard@pivotallabs.com>
Merge pull request #27 from pivotal-cf/add-non-whitelisted-comments

Add non whitelisted comments