converting Rfduino library to .jar file to support B​luetooth L​ow E​nergy for P​rocessing An​droid

I read https://github.com/joshuajnoble/blepdroid to convert the rfduino library into .jar file and add it to processing libraries. I am very new to android and I did not understand how to extract the .jar file as mentioned on the link. Could anyone help me figure out how the get the .jar file for the rfduino library?

-Thanks Goutham