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/xextproto/template

@@ -0,0 +1,12 @@
+# Template build file for 'xextproto'.
+pkgname=xextproto
+version=7.1.1
+distfiles="${XORG_SITE}/proto/$pkgname-$version.tar.bz2"
+build_style=gnu_configure
+short_desc="XExt extension headers from X.org"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=6d0abd31ddd57c2cb24cecf5fd90b4c29a276e20e3e03ca3c2c57d074f964d99
+long_desc="
+ This provides the XExt extension headers from modular X.org project."
+
+noarch=yes