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/grep/template

@@ -0,0 +1,19 @@
+# Template build file for 'grep'.
+pkgname=grep
+version=2.5.4
+distfiles="http://ftp.gnu.org/gnu/grep/$pkgname-$version.tar.bz2"
+build_style=gnu_configure
+configure_args="--disable-perl-regexp"
+short_desc="The GNU grep utility"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=0abec64e01458fbd032e33351d8071602a959529ea796965e98338ee83a40020
+long_desc="
+ GNU grep is based on a fast lazy-state deterministic matcher (about twice
+ as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper search for
+ a fixed string that eliminates impossible text from being considered by the
+ full regexp matcher without necessarily having to look at every character.
+ The result is typically many times faster than Unix grep or egrep."
+
+Add_dependency build texinfo
+Add_dependency build gettext
+Add_dependency run glibc