Notify users when a notification is triggered about gamesocial

[bfosberry]

Ideally we could tie in an async worker for this. We will need one to poll for changes in a users location, however for now, since we are performing manual updates, it would be ok to trigger off of a location update (after_save on game_location model maybe)

We will need to pop a new alert when a users location changes and it matches an alert criteria for another users. We'll probably need to do some dynamic searching on the alert schedule model for this. Also we'll need a new alert model which keeps track of previous instances and ensures that we dont create duplicates.

1. Create an alert model (naming open for specificity) to keep track of alerts that are popped.
2. Alert model should have title, body, active(y/n), status ("new", "sending", "delivered") plus an alert_schedule_id field for the rails join.
3. we need a process (either triggered from the game location controller or model, or a rake task) to process changes in game location, and match them up to alert schedules. Any alert schedule that matches should trigger an event, unless an active alert exists for that alert schedule.

An alert should be considered active based on whether the game_location is different than what it was when the alert was triggered. We can achieve this with two steps

First we can tie directly into the game_location model id. Changes are applied via creates, not updates.

Secondly we can have game_location create do a find_or_create_by_ALL_FIELDS to ensure that we dont create duplicates.

[bfosberry]

Partially done, split out into other issues