Nuance - federate out the design of NuanceSource via NuanceSourceDefinition

Summary: ...and get the basic edit flow "working" for a new NuanceSourceDefinition - the Phabricator Form. ...and fix a dumb bug in the query class so when you redirect to the view page / try to edit an existing NuanceSource you don't fatal.

Test Plan: played around with the edit form and it worked!

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7585

resources/sql/patches/20131120.nuancesourcetype.sql

@@ -0,0 +1,11 @@
+ALTER TABLE {$NAMESPACE}_nuance.nuance_source
+  DROP KEY key_type;
+
+ALTER TABLE {$NAMESPACE}_nuance.nuance_source
+  DROP COLUMN type;
+
+ALTER TABLE {$NAMESPACE}_nuance.nuance_source
+  ADD type VARCHAR(32) NOT NULL COLLATE utf8_bin AFTER name;
+
+ALTER TABLE {$NAMESPACE}_nuance.nuance_source
+  ADD KEY `key_type` (type, dateModified);