Silence warnings about unused variables.
make use of underlying_cast<int> when casting from an enum class.
Added README.md.
Added meta/libraries.json.
Merge pull request #12 from Lastique/patch-3

Silence warnings about unused variables.
Don't use atomic<thread::id> and so don't use testable_mutex.
Make use of core files.
Merge branch 'develop'
JSON fix.
Merge pull request #13 from danieljames/json-fix

Json fix
Merge branch 'develop'