remove source.

was resolved with 0c942d0f4315a852094445f9d340463c90d02ec0
add through to the activities relationship to match the model
add conditions to the membership relationship to match the model
Merge remote-tracking branch 'upstream/master'
rename has_person_into_circle person_in_circle?

boolean methods have a questions mark suffix
Space inside parentheses detected.
Avoid multi-line chains of blocks. Place the . on the next line, together with the method name.
Merge pull request #185 from acmetech/master

Minor code cleanup