Get rid of the clumsy make_XXX functions

[morinim]

With C++17, we get class template argument deduction. It is based on template argument deduction for function templates and allows us to get rid of the need for clumsy make_XXX functions.

[morinim]

Class Template Argument Deduction is an all or nothing process: https://stackoverflow.com/q/57563594/3235496

This could be problematic.