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/lcms/template

@@ -0,0 +1,24 @@
+# Template build file for 'lcms'.
+pkgname=lcms
+version=1.18a
+revision=1
+wrksrc=${pkgname}-${version%[a-z]*}
+distfiles="http://www.littlecms.com/$pkgname-$version.tar.gz"
+build_style=gnu_configure
+short_desc="Light Color Management System -- a color management library"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=fe679a33e7074b62e38c458ac2bbf06d688ae47171886a5a611cbf8ec4d88ddf
+long_desc="
+ LCMS is the Little Color Management System, a Color Matching Method
+ (CMM) library which implements fast transforms between ICC profiles.
+ It is released under LGPL with source code and meant to be portable.
+
+ Color management refers to techniques that ensure consistent color
+ as images are transferred from scanners or cameras to monitors and
+ printers."
+
+subpackages="$pkgname-devel"
+Add_dependency full glibc
+Add_dependency full zlib
+Add_dependency full jpeg
+Add_dependency full tiff