Fleshed out krb plugin and added example of scripting against Python API

doc/examples/python-api.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+from ipalib import api
+
+# 1. Initialize ipalib
+#
+# Run ./python-api.py --help to see the global options.  Some useful options:
+#
+#   -v  Produce more verbose output
+#   -d  Produce full debugging output
+#   -e in_server=True  Force running in server mode
+#   -e xmlrpc_uri=https://foo.com/ipa/xml  # Connect to a specific server
+
+api.bootstrap_with_global_options(context='example')
+api.finalize()
+
+# You will need to create a connection.  If you're in_server, call
+# Backend.ldap.connect(), otherwise Backend.xmlclient.connect().
+
+if api.env.in_server:
+    api.Backend.ldap2.connect(
+        ccache=api.Backend.krb.default_ccname()
+     )
+else:
+    api.Backend.xmlclient.connect()
+
+
+# Now that you're connected, you can make calls to api.Command.whatever():
+print 'The admin user:'
+print api.Command.user_show(u'admin')