sorting by created_at column ASC in sub-documents folder
cherry-pick 2
cuke scenario is passing
merged with upstream
fixed cuke to test for sorting logic
Merge pull request #186 from yggie/mailer

Mailer
pong to thomas: working on cucumber feature
pong to marcelo
Merge pull request #188 from yggie/mailer

Mailer fix
cucumber scenario passing for sorting subdocuments
undefined step now working: page show a list of members
final merge
Merge pull request #192 from decareano/marcelofix

Sort children documents
merged with upstream
added test to mailer_spec and updated the SendGrid credentials