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/xcb-proto/template

@@ -0,0 +1,30 @@
+# Template build for 'xcb-proto'.
+pkgname=xcb-proto
+version=1.5
+distfiles="http://xcb.freedesktop.org/dist/$pkgname-$version.tar.bz2"
+build_style=gnu_configure
+short_desc="XML-XCB (X C Bindings) protocol descriptions"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=0cf35b258e8f32773bcbd397ef3aca3ee6cac152260c99d2bd851488884c4638
+long_desc="
+ The xcb-proto package provides the XML-XCB (X C Bindings) protocol
+ descriptions that libxcb uses to generate the majority of its code and API.
+ We provide them separately from libxcb to allow reuse by other projects,
+ such as additional language bindings, protocol dissectors, or
+ documentation generators.
+
+ Separation of XCB's transport and protocol layers simplifies both
+ writing extensions and client-side support for extensions.
+ By contrast, with the xlib infrastructure, client-side support for
+ new extensions requires significant duplication of effort. With XCB and
+ the XML-XCB protocol descriptions, client-side support for a new
+ extension requires only an XML description of the extension--and not a
+ single line of code.
+
+ Python libraries: xcb-proto also contains language-independent Python
+ libraries that are used to parse an XML description and create objects
+ used by Python code generators in individual language bindings."
+
+noarch=yes
+Add_dependency build python
+Add_dependency build libxml2