Add a missing incref.

This fixes a potential segfault at teardown, when the class registry is
being emptied.
Add headers for C bindings to CFC.h.
Start Go bindings for CFC.
Provide Go access to CFCBindCore and CFCC.
Add INSTALL instructions.
Refactor Makefile creation routine.
Cease generating Clownfish static lib with C host.

We only need the static archive for other hosts, which will use it to
create their own libraries.
Regen runtime charmonizer for static lib changes.
Start Go bindings for runtime.
Add Go wrappers for Clownfish basic types.
Add INSTALL for the Go runtime bindings.
morewip
Temporarily disable GC in build.go.

CFC is afflicted with heap corruption, so disable GC for the time being.