Merge pull request #55 from gmarmstrong/env-bash

Replace "/bin/bash" with "/usr/bin/env bash"

gitfiti.py

@@ -302,7 +302,7 @@ def commit(commitdate):
 
 def fake_it(image, start_date, username, repo, git_url, offset=0, multiplier=1):
     template = (
-        '#!/bin/bash\n'
+        '#!/usr/bin/env bash\n'
         'REPO={0}\n'
         'git init $REPO\n'
         'cd $REPO\n'