closed #69 add field is_active for user in admin
closed #69 add field is_active for user in admin

saifrahmed/DjangoBB,LLK/s2forums,saifrahmed/DjangoBB,tjvr/s2forums,tjvr/s2forums,hsoft/slimbb,saifrahmed/DjangoBB,hsoft/DjangoBB,hsoft/slimbb,hsoft/slimbb,tjvr/s2forums,slav0nic/DjangoBB,rashoodkhan/DjangoBB,LLK/s2forums,rashoodkhan/DjangoBB,slav0nic/DjangoBB,agepoly/DjangoBB,hsoft/DjangoBB,LLK/s2forums,slav0nic/DjangoBB,hsoft/DjangoBB,agepoly/DjangoBB,agepoly/DjangoBB