README file updated

Author: mithileshkarnati

README.md

@@ -1,2 +1,20 @@
 # restcomm-sdk-java
 The Java SDK for RestComm REST API
+
+- To build the Project, after downloading the zip and extracting it from GitHub, navigate to the folder containing the pom.xml 
+file and buiild the project using the following command in the terminal
+
+```sh
+$ mvn package
+```
+- Now when this command is executed, the compilation,validation and testing will be done and after the successful completion of them, a jar file will be generated in the target folder.
+
+- Include the jar file in your build path to get Started.
+
+Java version: 1.8.0_131
+
+This is an SDK for RestComm REST API,
+To know more about Restcomm, please refer to http://documentation.telestax.com/
+
+Regarding issues, please refer to https://github.com/RestComm/restcomm-sdk-java/issues 
+