[mitreid-connect] Release 1.2.4

[Justin Richer]

Release 1.2.4 is out on Maven Central now with the following updates:

 - references to Kerberos and Internet Trust Consortium have been replaced with references to Internet Trust Consortium
 - Copyright updated to 2016 (happy new year!)
 - client admin console rendering bug fixed
 - added better error handling in fetching code
 - added client logo display to admin console
 - added client logo cacheing service (to preserve user privacy and help prevent drive-by downloads)
 - “zone_info” claim renamed to “zoneinfo” to be spec compliant

Upgrade from 1.2.3 is recommended thanks to the fix in the client administration page, otherwise this is pretty minor.

No changes have been released on the 1.1 branch at this time.

 — Justin