Merge pull request #53 from uggedal/uggedal-theme-doc

themes/uggedal/README.md

+## uggedal
+Minimal theme.
+
+![uggedal theme](https://f.cloud.github.com/assets/71/485623/c84ea45a-b8f7-11e2-8f7c-35a836aa7dbe.png)
+
+
+#### Characteristics
+
+* Only displays the `$CWD`.
+* Displays hostname if you're connected through `ssh(1)`.
+* Right prompt displays the last command's exit code if it was non-zero.