SDK Activity Feed

Adds the ability to validate input-text and input-password elements in Integration UI

• If a site has been linked to an integration, when the ntli preview command is run, a live URL is passed to the browser
• Fix previewing integration UI in Safari

Fixes an issue with the dev -a command when no connector is specified. Now the command will silently skip trying to start a connector when running dev -a, but will throw an error when running dev -c with no connector.

This first major release of the Netlify SDK contains all the tools necessary to start creating integrations for the Netlify platform.