Readme and build.xml update.

Author: babaissarkar

README.md

@@ -13,6 +13,18 @@ MyLibreLab docs (also useful here) : [MyLibreLab Docs](https://mylibrelab.github
 # Objective
 Unfortunately both MyOpenLab and MyLibreLab projects got discontinued. However, the orignal software from [here](https://myopenlab.org) is still usable, but requires Java 8. This repository tries to provide a version of MyOpenLab that runs with the latest java (for now, this is Java 17). Also, I have added a couple of changes, which are described in the Changelog.
 
+# Building
+Dependencies :
+Rhino and Rhino JSR-223 javascript engine
+JSON libarary
+JSSC
+JAXB libarary
+Old java swing GroupLayout jar.
+
+Dependencies are already included in distribution/myopenlab_lib.
+
+To build you will need Java JDK and Apache ANT installed. Run `ant` in this directory. The output will be the `myopenlab.jar` java archive in the `distribution` directory.
+
 # License
 Software is available under GNU GPL v3 license. See [here](https://www.gnu.org/licenses/gpl-3.0.html).