Identity view cert_fingerprints_by_expiry

Also move complex identity views into js designs.
Includes test.

Here's how you would query it from outside rails:
```
$ curl
'localhost:5984/identities/_design/Identity/_view/cert_fingerprints_by_expiry?startkey="2014-07-05"'
{"total_rows":4,"offset":1,"rows":[
{"id":"6c9091d4f13eaeaa6062c9d0528fd34d","key":"2014-07-05","value":"fingerprint"},
{"id":"6f3aa93828b4f6978d551f2623b9d103","key":"2014-07-05","value":"fingerprint"},
{"id":"b6cafacfa65042679691cd5065fb19e3","key":"2014-07-07","value":"fp"}
]}
```

Note that the expiry will be used as the key. So you should use the
current data (or yesterday) as the startkey to get all fingerprints that
have not expired yet.

The fingerprint itself is in the value. No need to include docs.

1 files changed, 8 insertions, 0 deletions

diff --git a/app/designs/identity/disabled.js b/app/designs/identity/disabled.js
new file mode 100644
index 0000000..5509575
--- /dev/null
+++ b/app/designs/identity/disabled.js
@@ -0,0 +1,8 @@
+function(doc) {
+  if (doc.type != 'Identity') {
+    return;
+  }
+  if (typeof doc.user_id === "undefined") {
+    emit(doc._id, 1);
+  }
+}