[split] Move uggedal theme to oh-my-fish/theme-uggedal

https://github.com/oh-my-fish/theme-uggedal

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.

themes/uggedal/fish_prompt.fish

-# name: Uggedal
-function fish_prompt
-  if test -n "$SSH_CONNECTION"
-    printf '%s ' $HOSTNAME
-  end
-
-  printf '%s ' (prompt_pwd)
-end

themes/uggedal/fish_right_prompt.fish

-function fish_right_prompt
-  set -l last_status $status
-
-  if test $last_status -ne 0
-    set_color red
-    printf '%d' $last_status
-    set_color normal
-  end
-end