editorconfig 0.11.5

I changed the source URL to the SourceForge one which was uploaded by me. This one includes testing files, and I wish to run `ctest .` before installing it. There are always 3 or 4 tests not run for me if I insert `system 'make test'` before `system 'make install'`. Could anyone help me on this, please? Thanks!

Despite the `ctest` stuff, this update should work properly.