IE 11 does not store cookie because of wrong time zone
https://issues.jboss.org/browse/KEYCLOAK-875
Merge pull request #888 from gerbermichi/master

Bugfix: Changed timezone to GMT so IE can store cookie
Merge pull request #890 from stianst/master

KEYCLOAK-874
using JSON.stringify(...) and JSON.parse(...)

see
http://lists.jboss.org/pipermail/keycloak-user/2014-December/thread.html
#1355
common eap code
Merge pull request #892 from patriot1burke/master

common eap code
Merge pull request #891 from nilspreusker/ie9-compatibility

IE9 Compatibility
KEYCLOAK-895 Document polyfillers for IE9 compatibility in keycloak.js