CMakeLists.txt: Remove NONE from project name, which invalidates cmake ability to check arch
CMakeLists.txt: Proper use LIB_SUFFIX and LIB_INSTALL_DIR enable some 64 bit Linux distros find pkgconfig file
CmakeLists.txt: Install python on default site_packages instead of pyshared. Most Linux distros already made the transition,
        for referennce Debian statement https://wiki.debian.org/Python/TransitionToDHPython2?action=show&redirect=Python%2FPyCentral2DhPython2
pc.in: Use correct package version and add proper description.

Signed-off-by: Helio Chissini de Castro <helio@kde.org>