I'm going to implement a normal stable vector instead of an inline
vector so we have both options for use. I think that's smarter than
just sticking to one.
We're storing them as sv_t's anyway, we're fucked with regards to
indirection. Thus, let's be nice to ourselves, and deal with the
structures. We get the size of the structure for free anyway!
We can register memory we've allocated onto the heap into a ~sys_t~
instance for examination (read: garbage collection) later. We can
also add items to the symbol table it has internally.
