Update for win 32


- fix the building of vle.dll using flag VLE_DLL
- remove static vle library (remove BUILD_SHARED_LIBS option)
- build a libgvle.dll fo win32
- template: use static boost libs
- template: add cmake macro for test building
- Define the cmake FindPackage scripts : VLE, VLE_DEPS, GVLE, GVLE_DEPS
- Modify gvle.pc to find libgvle for win32

(see the corresponding pull request for packages)