Add mtahmed theme.

--HG--
extra : amend_source : e3eb545150f7c4aa5ccaca80a64649419d154e6d

themes/mtahmed/README.md

+## mtahmed
+
+Minimal theme.
+
+![mtahmed theme](http://csclub.uwaterloo.ca/~mtahmed/media/images/fish.png)
+
+#### Left prompt
+
+- First 10 characters of hostname if `ssh`'ed
+- Current directory name (not path)
+- ─╼ (cute little unicode characters)
+
+#### Right prompt
+
+- Exit code of the previous command

themes/mtahmed/fish_prompt.fish

+# name: mtahmed
+# Left prompt:
+# - First 10 characters of hostname if ssh'ed
+# - Current directory name
+# - ─╼
+# Right prompt:
+# - Exit code of the previous command
+function fish_prompt
+  set_color $fish_color_cwd
+  if [ -n "$SSH_CONNECTION" ]
+    printf '%s | ' (hostname | head -c 10)
+  end
+  if [ "$HOME" = (pwd) ]
+    printf "~"
+  else
+    printf (basename (pwd))
+  end
+  printf " ─╼ "
+end

themes/mtahmed/fish_right_prompt.fish

+# name: mtahmed
+# Left prompt:
+# - First 10 characters of hostname if ssh'ed
+# - Current directory name
+# - ─╼
+# Right prompt:
+# - Exit code of the previous command
+function fish_right_prompt
+  set -l last_status $status
+  set_color $fish_color_cwd
+  printf $last_status
+end