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/helpers/python-module.sh

@@ -0,0 +1,14 @@
+#
+# This helper is for templates installing python modules.
+#
+
+do_install()
+{
+	if [ -z "$make_install_args" ]; then
+		make_install_args="--prefix=usr --root=$DESTDIR"
+	fi
+
+	cd ${wrksrc} || return 1
+	sed -i 's|man/man1|share/man/man1|g' setup.py || return 1
+	python setup.py install ${make_install_args} || return 1
+}