Fixes a bug where color of status arrow in prompt is red even when the exit code was zero (or success). This fix correclty returns green arrow on success and red for non-success exit code.
If the svn plugin is used, svn info (repo name and wether the repo is dirty) is displayed in the prompt like with git. Just lke with git, the colors can be manipulated with variables (see awesomepanda theme for example).
