fixed main.css for mceToolbar layout (refs #20)
fixed main.css for mceToolbar layout (refs #20)

tejima/testravis,isaosano/OpenPNE3,openpne/OpenPNE3,ShinichiU/OpenPNE3_with_webInstaller,upsilon/travis-test,upsilon/OpenPNE3,nishizoe/OpenPNE3,nise-nabe/ppcon-sns,ShinichiU/OpenPNE3,ShinichiU/OpenPNE3,tejima/OP3PKG,ShinichiU/AuthFramework,nishizoe/OpenPNE3,C-nakajima/OpenPNE3,nise-nabe/ppcon-sns,openpne/OpenPNE3,openpne/OpenPNE3,tejimaya/OpenPNE3,tejimaya/OpenPNE3,ShinichiU/AuthFramework,openpne/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/OpenPNE3,tejima/testravis,ShinichiU/OpenPNE3_with_webInstaller,C-nakajima/OpenPNE3,tejima/OP3PKG,upsilon/OpenPNE3,isaosano/OpenPNE3,tejima/testravis,ShinichiU/AuthFramework,kashiwasan/symfony-advanced,isaosano/OpenPNE3,balibali/KakiageSNS,kashiwasan/symfony-advanced,balibali/KakiageSNS,C-nakajima/OpenPNE3,ShinichiU/OpenPNE3,isaosano/OpenPNE3,upsilon/travis-test