Added docs for setting up vim.

vim/README.md

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+# Shaun's `tmux` Dotfiles
+
+## Location
+The configuration file needs to be present at this location, `~/.vimrc`. So, we can use the following command to softlink/symlink,
+
+```bash
+ln -s <location of cloned dotfiles .vimrc file> ~/.vimrc
+# e.g.
+# ln -s ~/dotfiles/vim/.vimrc ~/.vimrc
+```
+
+The configuration file also uses a directory to place scripts and files which needs to be present at this location, `~/.vim`. So, we can use the following command to softlink/symlink,
+
+```bash
+ln -s <location of cloned dotfiles .vim directory> ~/.vim
+# e.g.
+# ln -s ~/dotfiles/vim/.vim ~/.vim
+```
+
+## Install Plugin Manager (`Vundle`)
+We will use `vundle` as our plugin manager, but it cannot install itself. So we have to clone it into the proper place.
+```bash
+git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
+```
+
+## Install Plugins
+Once the tmux symlink is created, we can install all plugins. This is done from within a vim window.
+```bash
+vim
+:PluginInstall
+# Or this from the shell ..
+# vim +PluginInstall +qall
+```