v2.8.0

This release addresses a number of enhancements and bugs:

• Support SAML logins for Portal for ArcGIS
• Show Item ID & Owner for Items in Search Results
• If JSON doesn't pass validation, highlight issue
• For file based items, do not display JSON
• Issue loading items with null title
• Selecting "View My Stats" has errors

Also, improvements to building the source code:

• Better developer tooling (removes grunt)