closes#1464
- adds opt-out via updateCheck:false in config.js
- update check is done on admin index, but doesn't interfere with rendering
- adds update check module, which gets the usage data, makes the request and handles the response
- adds two new settings to default-settings, one for next check time, and one for whether to show the notification
- adds a new rejectError method to errorHandling
- adds a new helper for displaying the notification
Conflicts:
core/server/helpers/index.js
core/test/unit/server_helpers_index_spec.js
- changed cookieSession to session
- added session.regenerate for login and logout
- added bookshelf session store
- added session table to database
- added import for databaseVersion 001
- added grunt task test-api
- cleanup of gruntfile to start express when needed only
- moved api tests to functional tests
closes#1396
- moved core/test/unit/api* to core/test/integration/api/
- moved core/test/integration/model* to core/test/integration/model/
- moved core/test/unit/utils to core/test/utils
- moved core/test/unit/fixtures to core/test/utils/fixtures/
- changed gruntfile.js to execute api tests with target 'integration'
