Add Documentation/git-{import,export}.do scripts.

These export and import, respectively, the generated man pages to/from the
git branch called 'man'.  You can use it to retrieve the .1 files if you
don't have a working pandoc.

Documentation/git-export.do

@@ -0,0 +1,15 @@
+# update the local 'man' branch with pregenerated output files, for people
+# who don't have pandoc (and maybe to aid in google searches or something)
+redo-ifchange all
+git update-ref refs/heads/man origin/man '' 2>/dev/null || true
+
+export GIT_INDEX_FILE=gitindex.tmp
+rm -f $GIT_INDEX_FILE
+git add -f *.1
+
+MSG="Autogenerated man pages for $(git describe)"
+TREE=$(git write-tree --prefix=Documentation)
+git show-ref refs/heads/man >/dev/null && PARENT="-p refs/heads/man"
+COMMITID=$(echo "$MSG" | git commit-tree $TREE $PARENT)
+
+git update-ref refs/heads/man $COMMITID

Documentation/git-import.do

@@ -0,0 +1,8 @@
+exec >&2
+if git show-ref refs/heads/man >/dev/null; then
+	(cd .. && git archive man) | tar -xvf -
+else
+	(cd .. && git archive origin/man) | tar -xvf -
+fi
+
+