add info in README.md

Author: jbytecode

README.md

@@ -1,2 +1,23 @@
-# mcdm-scalajs
+# Easy Online MCDM 
+
 Multiple-criteria decision making tools in Scalajs
+
+# Try Online!
+
+[https://jbytecode.github.io/mcdm/](https://jbytecode.github.io/mcdm/)
+
+# Features
+
+- Single page application 
+- More than 20 MCDM methods 
+- Automatic weighting tools as well as custom weighting
+- After loading the page no need for internet connection
+- Works well in mobile devices
+
+# Implementation Details 
+
+- Written in Scala 
+- Compiled to Javascript using Scala.js
+- No external dependencies
+
+