Merge pull request #48 from austinylin/wip-129-message-api-fixes

WIP 129 Message API Fixes
Remove assets and helpers from scaffolds.

They usually create extra files that don't fit with the project structure.
Merge pull request #49 from austinylin/remove-mailman-readme

Remove mailman
Merge branch 'wip-27-read-receipts' of https://github.com/austinylin/helpful-web into austinylin-wip-27-read-receipts

Conflicts:
	app/models/message.rb
Upgrade sequential to 0.1