Add py-csvkit package

This adds the py-csvkit package and needed dependencies for working with
csv files.

var/spack/repos/builtin/packages/py-csvkit/package.py

@@ -0,0 +1,23 @@
+from spack import *
+
+class PyCsvkit(Package):
+    """
+    A library of utilities for working with CSV, the king of tabular file
+    formats
+    """
+    homepage = 'http://csvkit.rtfd.org/'
+    url      = "https://pypi.python.org/packages/source/c/csvkit/csvkit-0.9.1.tar.gz"
+
+    version('0.9.1', '48d78920019d18846933ee969502fff6')
+
+    extends('python')
+
+    depends_on('py-dateutil')
+    depends_on('py-dbf')
+    depends_on('py-xlrd')
+    depends_on('py-SQLAlchemy')
+    depends_on('py-six')
+    depends_on('py-openpyxl')
+
+    def install(self, spec, prefix):
+        python('setup.py', 'install', '--prefix=%s' % prefix)