On: Factor VM ported to C++

[wheels]

If minor changes trigger long compilation, there is something wrong with your code organization

A lot of larger C++ projects use "pimpl" for this reason (http://en.wikipedia.org/wiki/Opaque_pointer). Also in professional projects with large code bases that I've worked on in the past we've always had a distributed compilation environment (distcc, icecream, etc.)

[vicaya → wheels]

In a lot of cases, just use forward declarations to avoid unnecessary includes in the header files goes a long way.