Info about running scripts added

content/projects/gsoc/2018/simple-pull-request-job-plugin.adoc

@@ -55,6 +55,17 @@ Plugin will start above steps if and only if the pull request is will be
 mergeable to avoid merge conflicts while merging the source branch to target
 branch. The pull request is mergebale or not can also be decided by the webhook also.
 
+==== To run user scripts
+  User will provide path to the script relative to the root directory of the repository
+  without extension (.sh or .bat) in the YAML file. The plugin will generate pipeline script to detect the
+  platform and call .sh or .bat script.
+
+  Example:
+    Path provided: ./scripts/hello
+    If the build will be running on UNIX like os the ./scripts/hello.sh will be called
+    else ./scripts/hello.bat will be called.
+
+
 ==== Developement upto 24 May 2018
 * Source of YAML file can be specified in job configuration UI
 * git wrappers except push are done