[#659] Added TimestampsMixin to ProjectComment model and admin
[#659] Merge branch 'develop' into feature/659_comment_datetime
[#659] Merge branch 'develop' into feature/659_comment_datetime
[#659] Updated migrations of project comment datetime
[#659] Merge branch 'develop' into feature/659_comment_datetime
[#659] Updated migrations
[#659] Updated comment.time to comment.created_at in templates and views
Merge pull request #707 from akvo/feature/659_comment_datetime

[#659] Added created_at and last_modified_at to project comments