Major infrastructure changes, part 2.

* Moved helpers, common and triggers dirs into xbps-src, where
  they belong.
* Renamed the templates dir to srcpkgs, it was so redundant before.
* Make it possible to add subpkgs with no restriction in names, for
  example udev now has a subpkgs called "libgudev". Previously
  subpkgs were named "${sourcepkg}-${pkgname}".
* xbps-src: changed to look for template files in current directory.
  That means that most arguments from the targets have been removed.
* xbps-src: added a reinstall target, to remove + install.
* xbps-src: do not overwrite binpkgs by default, skip them.

And more that I forgot because it's a mega-commit that I've been
working for some days already...

--HG--
extra : convert_revision : 0f466878584d1e6895d2a234f07ea1b2d1e61b3e

xbps-src/shutils/builddep_funcs.sh

@@ -87,7 +87,7 @@ install_pkg_deps()
 install_dependencies_pkg()
 {
 	local pkg="$1"
-	local lpkgname=$(${XBPS_PKGDB_CMD} getpkgdepname ${pkg})
+	local lpkgname=$(${XBPS_PKGDB_CMD} getpkgname ${pkg})
 	local i pkgn iver reqver notinstalled_deps lver
 
 	[ -z "$pkg" ] && return 1