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

srcpkgs/python/python-devel.template

@@ -0,0 +1,17 @@
+# Template file for 'python-devel'.
+#
+short_desc="Python development files"
+long_desc="${long_desc}
+
+ This package contains files for development, headers, static libs, etc."
+
+Add_dependency run python
+
+revision=1
+
+do_install()
+{
+	mkdir -p ${DESTDIR}/usr/lib ${DESTDIR}/usr/bin
+	mv ${SRCPKGDESTDIR}/usr/bin/python*-config ${DESTDIR}/usr/bin
+	mv ${SRCPKGDESTDIR}/usr/include ${DESTDIR}/usr
+}