Updated readme file with installtion details.

README.md

 Build Status - master (This is stable branch): [![Build Status - master](https://travis-ci.org/BhallaLab/moose.svg?branch=master)](https://travis-ci.org/BhallaLab/moose)
 
-This is a meta repository of MOOSE simulator. It contains MOOSE, its GUI and
-other sister projects a submodule. For more details about these projects, read
-respective README files.
+This is the meta repository of MOOSE simulator. It contains C++ core of MOOSE,
+python scripting interface and its GUI. 
+
+For more details about these projects, read respective README files.
 
 # Install 
 
+~~~~
+./boostrap
+cmake .
+make 
+sudo make install
+~~~~