start using libformfactor

Polyhedron, associated classes, and some tests moved to external library.

Base/CMakeLists.txt

@@ -22,7 +22,7 @@ target_link_libraries(${lib}
     PUBLIC
     ${GSL_LIBRARIES}
     ${FFTW3_LIBRARIES}
-    ${formfactor_LIBRARY}
+    formfactor
     )
 target_include_directories(${lib}
     PUBLIC