Added Installation instructions

Author: robkorn

README.md

@@ -6,3 +6,10 @@ This is a Spacemacs layer for K which provides syntax highlighting via k3-mode.
 K3-Mode: https://github.com/kframework/k-editor-support/blob/master/emacs/k3-mode.el
 
 
+Installation
+==============
+        $ git clone https://github.com/robkorn/k-spacemacs-layer
+        $ cd k-spacemacs-layer 
+        $ mv k-framework ~/.emacs.d/private/local
+
+Then simply add 'k-framework' as one of your configuration layers in your spacemacs config.