added README

README.md

-# LustreC #
-
-LustreC is a modular compiler of Lustre code into C and Horn Clauses. 
-
-
-### People ###
-
-* Xavier Thirioux
-* Pierre-Loic Garoche
-* Temesghen Kahsai 
+Current Status:    [![Build Status](https://travis-ci.org/coco-team/lustrec.svg?branch=master)](https://travis-ci.org/coco-team/lustrec)
+# LustreC
+
+LustreC is a modular compiler of Lustre code into C and Horn Clauses.
+
+# Build
+```
+> autoconf
+> ./configure
+> make
+```
+
+# Usage
+```
+> ./bin/lustrec -help
+```
+
+# People
+* Pierre-Loic Garoche (ONERA)
+* Xavier Thirioux (IRIT)
+* Temesghen Kahsai (NASA Ames / CMU)