added LinkModel.findOrCreate
also clean up DB before tests start
passing error as 1st arg on findOrCreate, cleaning DB on startup working
Embedly saves API response as Link+Embed in DB
LinkModel.findOrCreate creates new documents pre-populated with searched for url
tests for Twitter model
added hint to API version
removed console.log
added array of tweets as associated model to LinkModel
made comment clearer
renamed methods
moved helper method into own file
created utils dir
tests for utils
put link stream routes in own place
only saving tweets with links, model now calling api service on demand
parsing json before callback
minor cleanup