Log Message:
Changes 0.3.2:
* Incremented binary version number
* Improved vignetting interpolation
* Internal code cleanups
* Custom install directories can be configured by CMAKE_INSTALL_XXX variables \ 
(CMake GNUInstallD
irs)
* New LENSFUN_WINDOWS_DATADIR CMake variable for better windows compatibility
* Support for parallel installation of different database versions