big huge changes, so i dont remember everything.

* renaming, e.g. LU ---> FullPivLU
* split tests framework: more robust, e.g. dont generate empty tests if a number is skipped
* make all remaining tests use that splitting, as needed.
* Fix 4x4 inversion (see stable branch)
* Transform::inverse() and geo_transform test : adapt to new inverse() API, it was also trying to instantiate inverse() for 3x4 matrices.
* CMakeLists: more robust regexp to parse the version number
* misc fixes in unit tests

unsupported/test/alignedvector3.cpp

@@ -69,6 +69,6 @@ void alignedvector3()
 void test_alignedvector3()
 {
   for(int i = 0; i < g_repeat; i++) {
-    CALL_SUBTEST(( alignedvector3<float>() ));
+    CALL_SUBTEST( alignedvector3<float>() );
   }
 }