Fixed a few bugs and added cassettes.

tests/cassettes/test_parser[reddit_uploads].yaml

@@ -0,0 +1,34 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      User-Agent: [python-requests/2.5.1 CPython/3.4.0 Linux/3.13.0-92-generic]
+    method: HEAD
+    uri: https://i.reddituploads.com/a065472e47a4405da159189ee48bff46?fit=max&h=1536&w=1536&s=5639918a0c696b9bb3ec694dc3cf59ac
+  response:
+    body: {string: ''}
+    headers:
+      Accept-Ranges: [bytes]
+      Age: ['487842']
+      CF-RAY: [2c864e7ed22a11b9-SJC]
+      Cache-Control: [max-age=300]
+      Connection: [keep-alive]
+      Content-Length: ['183244']
+      Content-Type: [image/jpeg]
+      Date: ['Tue, 26 Jul 2016 07:58:27 GMT']
+      Fastly-Debug-Digest: [0794b9fa1afd174c22abcd8455ed8cb859c900325e06b732b74cebd3063257a3]
+      Last-Modified: ['Wed, 20 Jul 2016 16:27:46 GMT']
+      Server: [cloudflare-nginx]
+      Set-Cookie: ['__cfduid=d34105474396dd4ddf576bcff4e4a81911469519907; expires=Wed,
+          26-Jul-17 07:58:27 GMT; path=/; domain=.reddituploads.com; HttpOnly']
+      X-Cache: ['HIT, HIT']
+      X-Cache-Hits: ['1, 1']
+      X-Content-Type-Options: [nosniff]
+      X-Imgix-Request-ID: [d0b67b89a628e062b1ed849e4e0f1d09b11fab9b]
+      X-Imgix-Wait: ['0']
+      X-Served-By: ['cache-lax1421-LAX, cache-sjc3128-SJC']
+    status: {code: 200, message: OK}
+version: 1