BUILD: provide LIBZ in makefiles
RCORE: zintern: fix bool constants
RCORE: zintern: use libc functions where possible
RCORE: zintern: add canonify()
RCORE: zintern: small doc updates
RCORE: zintern: argument processing updates
RCORE: zintern: remove glib uses
RCORE: zintern: only link against zlib
RCORE: zintern: fix --help and --version
RCORE: publically install rapicorn-zintern
RCORE: check installed rapicorn-zintern from installcheck
Merge branch 'zintern'

* zintern:
  RCORE: check installed rapicorn-zintern from installcheck
  RCORE: publically install rapicorn-zintern
  RCORE: zintern: fix --help and --version
  RCORE: zintern: only link against zlib
  RCORE: zintern: remove glib uses
  RCORE: zintern: argument processing updates
  RCORE: zintern: small doc updates
  RCORE: zintern: add canonify()
  RCORE: zintern: use libc functions where possible
  RCORE: zintern: fix bool constants
  BUILD: provide LIBZ in makefiles