Spring layout constraints for button bar considers the absence of buttons (buttons could be disabled by applet parameters)
Ant build file adds jarindex when creating jar file.
Jar file name is created using template signer-applet__Vn.m.jar. Here n.m is file version. This
will be used for applet caching.
Added signer.jnlp JNLP file for applet
Added sign-verify.jnlp JNLP file sign verify applet