add is_review field to Suggestion model,
add mark as spam custom action for admin,
filter for reviewed suggestions in view,
update suggestion template to inform of the review process,
test for both reviewed and not reviewed suggestions in template,
add common SPAM_WORDS to settings + documentation,
add mark_if_spam to check and mark suggestion as spam
Merge pull request #142 from asfaltboy/review_suggestions

Add process to review suggestions