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/xstow/template

@@ -0,0 +1,13 @@
+# Template build file for 'xstow'.
+pkgname=xstow
+version=0.6.1-unstable
+distfiles="$SOURCEFORGE_SITE/xstow/$pkgname-$version.tar.bz2"
+build_style=gnu_configure
+short_desc="Replacement of GNU Stow written in C++"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=f1872c10eccca3b3b4202e2e0f4c7f10833bc941e02f3f17776d5ddb192f68f5
+long_desc="
+ XStow as GNU Stow, are programs for managing the installation of
+ software packages, keeping them separate (/usr/local/stow/emacs vs.
+ /usr/local/stow/perl, for example) while making them appear to be
+ installed in the same place (/usr/local)."