added my modified oh-my-zsh version to repository

zsh/plugins/lighthouse/lighthouse.plugin.zsh

@@ -0,0 +1,16 @@
+# To use: add a .lighthouse file into your directory with the URL to the
+# individual project. For example:
+# https://rails.lighthouseapp.com/projects/8994
+# Example usage: http://screencast.com/t/ZDgwNDUwNT
+open_lighthouse_ticket () {
+  if [ ! -f .lighthouse-url ]; then
+    echo "There is no .lighthouse file in the current directory..."
+    return 0;
+  else
+    lighthouse_url=$(cat .lighthouse-url);
+    echo "Opening ticket #$1";
+    `open $lighthouse_url/tickets/$1`;
+  fi
+}
+
+alias lho='open_lighthouse_ticket'