This removes all scpack-packed strings and moves normal strings from
.scp files to corresponding .c files. The code responding for packing
and unpacking is gone as well.
If you have enough memory to run a SA-MP server you most likely have
more than enough of it to not worry about saving a few additional KBs
of text. Besides, these strings were kind of hard to navigate / edit,
and you could easily forget to regenerate them with scpack (though it
could be automated).
The grow_stgbuffer() function, which grows the staging buffer, was
not updating the buffer size after reallocating the buffer itself.
This caused lots of reallocations because stgwrite() calls this
function for every character (!).
This also decreases compile times by ~20% (from 10s down to 8s in
my setup).
