649fde1e typelist: Add drop
5efe868d travis: Drop GCC 7 from CI
c3f890f1 Update to use new metavalue types
c4dd1c9b metavalue: Add some common operations
7da45c71 Remove unnecessary public keyword for struct inheritance
287d8e7e Correct typos in file headers
git-subtree-dir: externals/mp
git-subtree-split: 649fde1e814f9ce5b04d7ddeb940244d9f63cb2f