README file updated with information on how to enable the thermal simulation feature

README.md

@@ -113,6 +113,25 @@ $ cd analyzer
 $ ./traceAnalyzer
 ```
 
+### DRAMSys Thermal Simulation 
+
+  This feature can be enabled via an environment variable.
+
+``` bash
+$ export THERMALSIM=true
+$ qtcreator &
+```
+
+or
+
+``` bash
+$ mkdir build
+$ cd build
+$ export THERMALSIM=true
+$ qmake ../DRAMSys/dram.vp.system.pro
+$ make
+```
+
 ### DRAMSys Configuration
 
 The **dramSys** executable supports one argument which is a XML file that