adding a zsh package

var/spack/packages/zsh/package.py

@@ -0,0 +1,16 @@
+from spack import *
+
+class Zsh(Package):
+    """ The ZSH shell """
+    homepage = "http://www.zsh.org"
+    url      = "http://www.zsh.org/pub/zsh-5.0.8.tar.bz2"
+
+    version('5.0.8', 'e6759e8dd7b714d624feffd0a73ba0fe')
+
+    depends_on("pcre")
+
+    def install(self, spec, prefix):
+        configure('--prefix=%s' % prefix)
+
+        make()
+        make("install")