New formula: udunits

Library and utility for parsing and converting
units of physical quantities.

http://www.unidata.ucar.edu/software/udunits/
Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/udunits.rb

@@ -0,0 +1,22 @@
+require 'formula'
+
+class Udunits <Formula
+  url 'ftp://ftp.unidata.ucar.edu/pub/udunits/udunits-2.1.17.tar.gz'
+  homepage 'http://www.unidata.ucar.edu/software/udunits/'
+  md5 'cc7d011987b0473c352119a1bcbfb0ea'
+
+  def options
+    [
+      ["--html-docs", "Installs html documentation"],
+      ["--pdf-docs", "Installs pdf documentation "]
+    ]
+  end
+
+  def install
+    system "./configure", "--disable-debug", "--disable-dependency-tracking", "--prefix=#{prefix}"
+    targets = ["install"]
+    targets << "install-html" if ARGV.include? "--html-docs"
+    targets << "install-pdf" if ARGV.include? "--pdf-docs"
+    system "make", *targets
+  end
+end