Rename saturnin_common to saturnin_meta

The routines are all basically related to the meta-command functions.

mkit.ini

     src/libexec/saturnin-uris               = saturnin-uris
 
 [files:share]
-    src/ffoo/saturnin_common.sh             = ffoo/saturnin_common.sh
+    src/ffoo/saturnin_meta.sh               = ffoo/saturnin_meta.sh
     src/ffoo/saturnin_urimagic.sh           = ffoo/saturnin_urimagic.sh
     src/ffoo/saturnin_zleep.sh              = ffoo/saturnin_zleep.sh

src/bin/saturnin.skel

 # =====END BUILT PART=====
 #
 
-ffoo import saturnin_common
+ffoo import saturnin_meta
 
 export FFOO_INIGREP_PATH FFOO_PATH FFOO_PRETTY_USAGE \
        SATURNIN_VERSION SATURNIN_CACHE_HOME

src/libexec/saturnin-au

 
 ffoo import pretty
 
-ffoo import saturnin_common
+ffoo import saturnin_meta
 
 
 usage() {

src/libexec/saturnin-iam

 ffoo import pretty
 ffoo import sync
 
-ffoo import saturnin_common
+ffoo import saturnin_meta
 ffoo import saturnin_zleep