release(1.2.0-rc-1): Releasing inline with angular-seed 1.2.0-rc-2

* fix(backgroundTasks): Only load tasks if clever-background-tasks is installed
* fix(backgroundTasks): Only load tasks if clever-background-tasks is installed
* fix(Model): fixed definition bug in Model
* fix(mailer): Patched default mailer util to safely include sendgrid
* refactor(promises): Updated usage of Promise API inline with the latest version
* update(deps): All dependencies updated except express
* refactor(seedData): Updated seed data for default account and user
* refactor(seedData): Temp fix for testing
* fix(bundledDependencies): Removed clever-orm and clever-auth from default installation
* fix(Seed): Moved module related seedData into their respective modules