Implementation of Tizen SSO APIs

Implementation of SSO APIs as per widl file https://code.google.com/p/accounts-sso/source/browse/widl/signon.widl?repo=libgsignon-glib

Backend that provides core functionality is gSSO and more information about that
component could be found at https://01.org/gsso
gchar is typedef of char, https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar. The compiler won't complain at all. I presume you agree that reduce the include number in a header benefits the build time in general.