Your .vimrc seems fine. Looks like you have not installed the vundle plugin properly.
Run this command on your console.
git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim
You should have a directory structure like (I simplified it):
~/.vim
├── bundle/
│ └── Vundle.vim <------------------ Vundle
├── colors/
│ └── Tomorrow.vim
└── plugin/
└── acp.vim