Won't run and compile with qt5.

Won't run and compile with qt5. Error when run something:

    $ rake db:migrate
    No runner found, attempting to compile...
    make: *** Нет правила для сборки цели `clean'.  Останов.
    which: no gmake in (/home/petrushka/.rvm/gems/ruby-1.9.3-p327/bin:/home/petrushka/.rvm/gems/ruby-1.9.3-p327@global/bin:/home/petrushka/.rvm/rubies/ruby-1.9.3-p327/bin:/home/petrushka/.rvm/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/android-ndk:/opt/android-sdk/platform-tools:/opt/android-sdk/tools:/opt/java/bin:/opt/java/db/bin:/opt/java/jre/bin:/usr/bin/vendor_perl:/usr/bin/core_perl:/opt/qt/bin)
    g++ -c -pipe -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_WEBKIT_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/qt/mkspecs/linux-g++ -I. -I/usr/include/qt5 -I/usr/include/qt5/QtWebKit -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -o Page.o Page.cpp
    In file included from Page.cpp:5:0:
    Page.h:7:20: Error: invalid use of incomplete type «class QWebPage»
    In file included from /usr/include/qt5/QtWebKit/QtWebKit:8:0,
                     from Page.cpp:2:
    /usr/include/qt5/QtWebKit/qwebelement.h:157:18: Error: forward declaration of «class QWebPage»
    Page.cpp: In constructor «Page::Page()»:
    Page.cpp:7:16: Error: type «QWebPage» is not a direct base of «Page»
    make: *** [Page.o] Error 1

I fixed it in my pull request.