new test cc_cblas (closes #95)

- extended math_libs.cmake for C headers detection
- static_linking test included
- no int64 in the cc_cblas test
- released allocated memory
- adaptated for MS Windows (OpenBLAS)

test/cc_cblas/cmake/autocmake.cfg

@@ -0,0 +1,17 @@
+[project]
+name: example
+
+[cc]
+source: ../../../modules/cc.cmake
+
+[static]
+source: ../../../modules/static_linking.cmake
+
+[math_libs]
+source: ../../../modules/math_libs.cmake
+
+[default_build_paths]
+source: ../../../modules/default_build_paths.cmake
+
+[src]
+source: ../../../modules/src.cmake