Review changes made for Issue #53 CMake

I've made all the CMakeList files the project needs. I managed to get the project to build, compile and install. However, when I try to run the qmlscene ui/main.qml, it can't seem to find the directories where the plugins are installed. Could you have a look?
It's very nice that CMake lets you keep the qmldir here, but puts in in the right folder in the build directory.  So go ahead and delete the various qmldir files in Epub/, etc.