#46 libMems does not compile with g++-6 [patch]

[Gert Wollny]

Hello,

libmems fails to compile with g++-6 as reported in Debian bug [811682[(https://bugs.debian.org/811682). The problem arises, because make_tuple also exists in the std namespace for -std >= c++11 and g++-6 defaults to c++14.

The attached patch fixes this by explicitley calling boost::tuples::make_tuple.

Best,
Gert