* Fixed compiling with Qt5.
* Don't look for Qt4.
* Let's see if this fixes Qt5 compiling.
Add newer UrlQuery handling for Qt5
Fix building fingerprinting with Qt5.1
Wrap urlquery handling in one function
Add the option to force building with Qt4
Merge pull request #18 from xhochy/build-with-qt51

Build with qt51
Don't use Q_WS_XXX defines as they don't exist in qt5. Always use Q_OS_XXX.
A Url class to make it easy to write code that builds on qt4 and qt5.
Separate the QObject and QSharedData classes. For no other reason than multiple inheritance makes me nervous.
Fix Url encoding.
More fixing!