Update all scripts to ensure bash portability

Change the shebang from /bin/bash to /usr/bin/env

Issue: #1
Delete check for xCode

Homebrew now checks if you're on a version of Mac OSX greater than 10.8,
if so it will install xCode Command Line tools. Since all of my machines
are currently on 10.9 and any future machine will be, it's safe to
assume [Homebrews installation][ref].

[ref]: https://github.com/Homebrew/homebrew/blob/go/install#L161

Issue: #2
Update location of Hombrew installation script

Homebrew transferred ownership from @mxcl to an official @homebrew user,
so update the location in case @github decides to deprecate redirects.

Issue: #2
Update location of download tarball

The tarball is programmatically downloaded and removed; if for some
reason it fails to remove, the script won't exit (as intended) and
the tarball is left.  Moving the tarball to the /tmp directory is
where traditionally tarballs[1][invisibles] are temporarily stored so
that when the computer restarts, the /tmp folder will be emptied[2][tmp]

[tmp]: http://superuser.com/a/581732/298006
[invisibles]: http://www.westwind.com/reference/OS-X/invisibles.html

Issue: #3
Create Brewfile

Homebrew now supports a bundler file (Brewfile) to store all packages.
Copy over all packages to new Brewfile in same order.

Issue: #4
Update install script to use Brewfile

Issue: #4
Update README

- Delete any name at the top of the file
- Update #Acknowledgements section with @necolas
Create Vundle as submodule

Create bundles.vim to include Base16 & Ctrl-P plugins

Issue: #5
Update .vimrc to use Vundle

Issue: #5
Update install script to install ViM bundles

Issue: #5
Delete `brew doctor` from Brewfile to fix bug

Apparently Brewfile doesn't support the `brew doctor` command, so delete
it from Brewfile and update dotfiles with command after Homebrew
installation process.

Issue: #4
Update vimrc to use base16 colorscheme for ViM

Issue: #6