649fde1e8 typelist: Add drop
5efe868da travis: Drop GCC 7 from CI
c3f890f17 Update to use new metavalue types
c4dd1c9b9 metavalue: Add some common operations
7da45c71b Remove unnecessary public keyword for struct inheritance
287d8e7ec Correct typos in file headers
git-subtree-dir: externals/mp
git-subtree-split: 649fde1e814f9ce5b04d7ddeb940244d9f63cb2f