stateManager: add basic subscribe/unsubscribe functions
stateManager: add basic subscribe/unsubscribe functions

colllin/famous-framework,KraigWalker/framework,Famous/framework,SvitlanaShepitsena/remax-banner,infamous/famous-framework,jeremykenedy/framework,woltemade/framework,tbossert/framework,colllin/famous-framework,infamous/famous-framework,infamous/framework,ildarsamit/framework,jeremykenedy/framework,SvitlanaShepitsena/framework,woltemade/framework,SvitlanaShepitsena/framework-1,Famous/framework,SvitlanaShepitsena/framework,SvitlanaShepitsena/shakou,SvitlanaShepitsena/shakou,SvitlanaShepitsena/framework-1,KraigWalker/framework,infamous/framework,ildarsamit/framework,tbossert/framework,SvitlanaShepitsena/remax-banner