FishFace theme [#67]

themes/fishface/README.md

+## FishFace
+
+Shows an ASCII fish which is blue or green when in a git repo.
+
+![fishface theme](https://https://f.cloud.github.com/assets/66143/1224622/ec9660d8-2750-11e3-9c96-cb7a5a69eada.png)

themes/fishface/fish_prompt.fish

+# name: FishFace
+
+function _git_branch_name
+  echo (command git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
+end
+
+function _is_git_dirty
+  echo (command git status -s --ignore-submodules=dirty ^/dev/null)
+end
+
+function fish_prompt
+  set -l blue (set_color -o blue)
+  set -l green (set_color -o green)
+
+  if [ (_git_branch_name) ]
+    echo -n -s "$green><(((\"> "
+  else
+    echo -n -s "$blue><(((\"> "
+  end
+end