FED-202: Modified backplane2.js resetCookieChannel() to remove the cookie rather than setting its component parts to "null"
FED-202: adding back code to clear stale js variables on reset.
Merge pull request #39 from janrain/FED-202_Backplane_channel_not_reset_on_logout_with_redirect

FED-202: Modified backplane2.js resetCookieChannel() to remove the cooki...