[bobthefish] Mention hg in README :)

README.md

@@ -29,9 +29,9 @@ This theme is based loosely on [agnoster][agnoster].
      * You currently have superpowers ($)
  * User@Host (unless you're the default user)
  * Abbreviated parent directory
- * Current directory or Git project name
- * Current project's Git branch ( master) or detached head (➦ d0dfd9b)
- * Git status, via colors and flags:
+ * Current directory, or Git or Mercurial project name
+ * Current project's repo branch ( master) or detached head (➦ d0dfd9b)
+ * Git or Mercurial status, via colors and flags:
      * Dirty working directory (*)
      * Untracked files (…)
      * Staged changes (~)
@@ -39,6 +39,7 @@ This theme is based loosely on [agnoster][agnoster].
      * Unpulled commits (-)
      * Unpushed commits (+)
      * Unpulled *and* unpushed commits (±)
+     * _Note that not all of these have been implemented for hg yet :)_
  * Abbreviated project-relative path