Add an installation guide.

install.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+if [ -f $HOME/.vimrc ]
+then
+	echo "Already have a local vimrc, abort."
+	exit 1
+fi
+
+if [ ! -f $HOME/.vim/vimrc ]
+then
+	echo "Vimconfig rc not found, abort."
+	exit 2
+fi
+
+echo "Installing .vimrc"
+ln -s $HOME/.vim/vimrc $HOME/.vimrc
+
+echo -n "Downloading dependencies..."
+cd $HOME/.vim
+
+git submodule init
+git submodule update
+
+echo " Done"
+
+echo
+echo "Installation finished."