ignore node_modules directory
Merge pull request #922 from wilmoore/ignore-node-modules

ignore node_modules directory
Add rake task for clearing out old notifications
Add rake task to clear out invalid emails
Change flash message on hibernation
Specify the db host in development environment. Fixes #921.

Some machines don't make that assumption. May as well be explicit about
it.
added test db migration to README.md
Merge pull request #924 from bjhaid/master

added test db migration to README.md