Add information about git-lfs in top Readme.md

Author: dmitrygolovkin

README.md

@@ -10,3 +10,23 @@ Consult the Caffe Model Zoo for details:
 and the following for Caffe Zoo license terms and conditions:
 
     http://caffe.berkeleyvision.org/model_zoo.html#bvlc-model-license
+
+## Usage Instructions
+**IMPORTANT NOTE:  This repository uses git-lfs for large file storage.  You can't use zip and tar files listed in the "Assets" section above (added by default by github).  You must clone the repository using the instructions below** 
+
+1. Install git-lfs
+
+2.  Ensure git-lfs and git versions you use are compatible (equal or greater than below)
+```
+$ git lfs version
+git-lfs/2.0.2 # or newer
+
+$ git –version
+git version 2.9.3 # or newer
+```
+3.  Add [SSH key](https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/) to your GitHub account (if you haven't already)
+
+4. clone the repo:
+```
+$ git clone https://github.com/foss-for-synopsys-dwc-arc-processors/synopsys-caffe-models.git
+```