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/gnome-icon-theme/template

@@ -0,0 +1,20 @@
+# Template build file for 'gnome-icon-theme'.
+pkgname=gnome-icon-theme
+version=2.26.0
+distfiles="${GNOME_SITE}/$pkgname/2.26/$pkgname-$version.tar.gz"
+build_style=gnu_configure
+short_desc="Theme consisting of a set of icons for GNOME"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=3404629afa659a61c539c7a9c3c5528ede7b23d2d9552ea7c5709285ab5ec74a
+long_desc="
+ This package contains a set of icons forming the default icon theme
+ for GNOME."
+
+noarch=yes
+gtk_iconcache_dirs="/usr/share/icons/gnome"
+triggers="gtk-icon-cache"
+
+Add_dependency build pkg-config
+Add_dependency build intltool
+Add_dependency build icon-naming-utils
+Add_dependency full  librsvg