Major changes to not depend on cksum and db from NetBSD.

Two new utilities in C have been created:
	- xbps-digest: shows the SHA256 hash for a file.
	- xbps-pkgdb: handles dependency stuff via proplib.

Templates should use now $build_depends and change $checksum to be
a SHA256 hash. That means that I'm currently using xbps on Linux and
I lost interest on NetBSD, perhaps I'll add support for it in the
future.

Only git and its dependencies have been converted, as well as vim.

--HG--
extra : convert_revision : 53a7e030ca6b6d02bb6cd3e51d42b7d5702c1b57

templates/expat.tmpl

@@ -6,8 +6,10 @@ http://kent.dl.sourceforge.net/sourceforge/expat/$pkgname-$version@.tar.gz"
 build_style=gnu_configure
 short_desc="XML parser library written in C"
 maintainer="Juan RP <xtraeme@gmail.com>"
-checksum=d31bcb152adaff9e358968be1ea901e1b4ed3b2f
+checksum=847660b4df86e707c9150e33cd8c25bc5cd828f708c7418e765e3e983a2e5e93
 long_desc="
  This is James Clark's expat XML parser library in C. It is a stream
  oriented parser that requires setting handlers to deal with the
  structure that the parser discovers in the document."
+
+build_depends="libtool-2.2.6a"