Failing specs: "Adding a post to a spring notifies the post author"
Adding a post to a spring now notifies the post author.
PoolPost model.
Failing specs for notification subject being PoolPost instead of Pool.
Move notify_about_springing from Post model to Pool model.  Make use of PoolPost in notification code.
Added PoolPost#member .
Added spec: "Adding a post to a pool does not notify the author"
Merge branch 'spring-addition-notif'