Merge pull request #7 from curiousstranger/oh-my-zsh-integration

Oh my zsh integration
diff --git a/git-flow-completion.plugin.zsh b/git-flow-completion.plugin.zsh
new file mode 120000
index 0000000..1d37048
--- /dev/null
+++ b/git-flow-completion.plugin.zsh
@@ -0,0 +1 @@
+git-flow-completion.zsh
\ No newline at end of file