Move sculpin-old files to sculpin-old directory

sculpin-old/source/_talks/git-flow.md

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+---
+title: Never Commit to Master - An Introduction to Git Flow
+description:
+  An introduction to and demonstration of the Git Flow branching model.
+speakerdeck:
+  id: 201559e0f103013198dd5a5f6f23ab67
+  ratio: '1.29456384323641'
+  url: https://speakerdeck.com/opdavies/never-commit-to-master-an-introduction-to-git-flow
+video:
+  type: youtube
+  id: T-miCpHxfds
+tags: [conference, drupalcamp, drupalcamp-london, git, git-flow]
+tweets: yes
+events:
+  - event: drupalcamp_london_14
+    date: 2014-03-01
+---
+
+An introduction to the Git Flow branching model and the git-flow plugin, and how
+I’ve used them to manage a Drupal development project.