L2Program/FlintPlusPlus — pull request #41 by kanielc (2014-06-03 23:58:31+00:00)
Title: Check using namespace

It's pretty much the exact same logic as for static at global/namespace
scope. Instead of 'static', we just need to check for 'using
namespace', so I included this check into the NamespaceScopedStatics
check.

Note that with this change the codebase no longer lints perfectly, since
we have 'using namespace std;' declarations in our headers.