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?
components/UbuntuWebView.qml was removed recently.  components/TitlelessDialog.qml was added recently.  Also, we should include components/OptionsSelector.qml, which I keep around because I don't trust them not to change the interface with its delegate again.