add judy dynamic array/meta-trie/hash table lib

Just adding judy.

var/spack/packages/judy/package.py

@@ -0,0 +1,15 @@
+from spack import *
+
+class Judy(Package):
+    """A general-purpose dynamic array, associative array and hash-trie - Judy"""
+    homepage = "http://judy.sourceforge.net/"
+    url      = "http://downloads.sourceforge.net/project/judy/judy/Judy-1.0.5/Judy-1.0.5.tar.gz"
+
+    version('1.0.5', '115a0d26302676e962ae2f70ec484a54')
+    parallel = False
+
+    def install(self, spec, prefix):
+        configure('--prefix=%s' % prefix)
+
+        make()
+        make("install")