Created initial README.md

Change-Id: Ic799939d918b1b037ece1bc434a4e0abc5a39e97
Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
diff --git a/sim/hei_sim_main.cpp b/sim/hei_sim_main.cpp
index 035d003..7ddf7b4 100644
--- a/sim/hei_sim_main.cpp
+++ b/sim/hei_sim_main.cpp
@@ -3,7 +3,7 @@
 
 int main()
 {
-    HEI::Isolator iso;
+    libhei::Isolator iso;
 
     iso.initialize();