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/perl-XML-SAX/patches/disable_install_stuff.diff

@@ -0,0 +1,49 @@
+Disable asking/registering the parser at install time, we do this
+in the INSTALL/REMOVE scripts.
+
+--- Makefile.PL.orig	2009-04-21 19:00:26.282249017 +0200
++++ Makefile.PL	2009-04-21 19:00:33.901197702 +0200
+@@ -11,43 +11,3 @@ WriteMakefile(
+         'XML::NamespaceSupport' => 0.03,
+     },    
+ );
+-
+-sub MY::install {
+-    package MY;
+-    my $script = shift->SUPER::install(@_);
+-
+-    # Only modify existing ParserDetails.ini if user agrees
+-
+-    my $write_ini_ok = 0;
+-
+-    eval { require XML::SAX };
+-    if ($@) {
+-        $write_ini_ok = 1;
+-    }
+-    else {
+-        my $dir = File::Basename::dirname($INC{'XML/SAX.pm'});
+-        if (-e File::Spec->catfile($dir, 'SAX', 'ParserDetails.ini')) {
+-            $write_ini_ok =
+-                ExtUtils::MakeMaker::prompt(
+-                    "Do you want XML::SAX to alter ParserDetails.ini?", "Y"
+-                ) =~ /^y/i;
+-        }
+-        else {
+-            $write_ini_ok = 1;
+-        }
+-    }
+-    
+-    if ($write_ini_ok) {
+-        $script =~ s/install :: (.*)$/install :: $1 install_sax_pureperl/m;
+-        $script .= <<"INSTALL";
+-
+-install_sax_pureperl :
+-\t\@\$(PERL) -MXML::SAX -e "XML::SAX->add_parser(q(XML::SAX::PurePerl))->save_parsers()"
+-
+-INSTALL
+-
+-    }
+-
+-    return $script;
+-}
+-