*.sh: Don't depent on bash to be at /bin/bash.

Scripts use
/usr/bin/env bash
instead of
/bin/bash

install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 echo "If you are upgrading, press ctrl + c NOW! You have 15 seconds time to cancel this. rerunning this script will overwrite your backups and it makes uninstall.sh useless."
 sleep 15;
 echo "Taking backups..."

uninstall.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 echo "Restoring default files..."
 cat ~/.bashrc.default.backup > ~/.bashrc
 cat ~/.bash_aliases.default.backup > ~/.bash_aliases

upgrade.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 echo "Backing up files..."
 touch ~/.bash_exports
 cat ~/.bash_exports > ~/.bash_exports.old.backup