Added PHP 5.6 to travis.
Added PHP 5.6 to travis.
ircmaxell/password_compat,mitschool/password_compat,shirone/password_compat,adduc/password_compat,Choockas/password_compat,samadsajanlal/password_compat,baegjins/password_compat,Shea690901/password_compat,yadercenteno/password_compat,jemmeliCss/password_compat,suitux/password_compat