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/libXv/template

@@ -0,0 +1,20 @@
+# Template build file for 'libXv'.
+pkgname=libXv
+version=1.0.5
+distfiles="${XORG_SITE}/lib/$pkgname-$version.tar.bz2"
+build_style=gnu_configure
+short_desc="Xv Extension library"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=d549afdf22feefb97cca85dee12242af9f08c4d2435255dc7c30bd17d1d96010
+long_desc="
+ This package provides the X Window System video extension from
+ the modular X.org project"
+
+subpackages="$pkgname-devel"
+Add_dependency build pkg-config
+Add_dependency build xproto
+Add_dependency build xextproto
+Add_dependency build videoproto
+Add_dependency full glibc
+Add_dependency full libX11
+Add_dependency full libXext