Add open API for accessing our data

[geoffreylitt]

We should make sure event structures are somewhat standardized before exposing an API, but we should make this data accessible to other apps.

[radhikamalik]

https://github.com/xcv58/meteor-collectionapi seemed promising in initial investigations

[patrickgreenwell]

I took a look into collectionApi using https://github.com/kahmali/meteor-restivus as it looks like its more extensible. Collection API gives basic CRUD functionality, and it's got the basics around what needs to be there, stuff like:

GET /api/reports/{id} //gets a specific report
GET /api/reports/ //gets all non-expired reports

But if we' ever think about expanding it to more RESTful style we'd need the routing in restivus that comes in by default. It'd let us do things like:
GET /api/reports/line/{line} //gets non-expired reports by line
GET /api/reports/stop/{station} //gets non-expired reports by station
quite easily as well as allowing us to build out the base collections quickly as it's built on top of collectionapi

I'll see if I can get something put together tomorrow night at hacknight.