Doesn't compile

Running sgmake inside kit gives this error:

```
tests/args.test.cpp:1:tests/meta.test.cpptests/log.test.cpp::1110::10::10 :  fatal errorfatal error: fatal error: : 'catch.hpp' 'catch.hpp'file  not file foundnot found

'catch.hpp' file not found#include <catch.hpp>#include <catch.hpp>
```

The file clearly isn't present but is required, so there must be some dependency not listed in the readme.
