Updated the readme file

Readme.md

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+# Trim.SP - TRIM simulation #
+
+### Contents ###
+
+This is the fortran source code and GUI of TrimSP Monte-Carlo simulations. 
+
+* This code is specifically tuned to simulate implantation of low energy projectiles in materials.
+* The code is maintained by the Low Energy Muons group at PSI. 
+* The GUI is written in Node.js, JavaScript and Electron. 
+* The binary (statically linked) from the fortran code is also included.
+* RPM and DEB packages are also included
+
+### Supported platforms: ###
+
+* Linux
+
+### Contact ###
+Zaher Salman <zaher.salman@psi.ch>
+