Reorganize the tree for easier and better handling.

- Template helpers have been moved to templates/helpers.
- Documentation to docs/.
- Common scripts have been moved to utils/sh.
- Fixed install-destdir when executed via chroot.
- Added a build-pkg target that builds a binary package.
  The package must be installed into destdir before using.
- Misc tweaks and fixes.

--HG--
extra : convert_revision : 0896e8f24bb7592116aaf77ae9c776033818a3d8

helpers/update-mimedb.sh

@@ -1,13 +0,0 @@
-#
-# This helper updates shared-mime-info's database when a template
-# requests this operation.
-#
-updatemimedb_cmd="$XBPS_MASTERDIR/bin/update-mime-database"
-updatemimedb_dir="$XBPS_MASTERDIR/share/mime"
-
-if [ -d "$XBPS_MASTERDIR/share/mime" ]; then
-	$updatemimedb_cmd $updatemimedb_dir >/dev/null && \
-		echo "=> Updated shared-mime-info database."
-fi
-
-unset updatemimedb_cmd updatemimedb_dir