Added session timeout warning
Added session timeout warning

based on https://groups.google.com/forum/#!topic/yesodweb/exufYmaJFFw

Session timeout parameter is in minutes, not seconds, so it is five days
instead of two hours. It seems to go back to seconds again later, so did
not change the parameter.

mostalive/yesod-splittest,mostalive/yesod-splittest