Merge pull request #369 from phigoro/master

align hashbang of git-guilt & git-merge-into

bin/git-guilt

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 for param in $*
 do

bin/git-merge-into

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 current_branch() {
     git rev-parse --abbrev-ref HEAD