try getting fb signed_request
added function to decode fb signed_request
fixed typo
fixed typo
fixed typo
added token user_id vs. signed_rq user_id check
fixed typo
moved signed_request processing before login
some debug prints
some debug prints
rework login
rework login
rework login
fixed typo
rework login
rework login
rework login
rework login
rework login
rework login