We need a mechanism to provider named parameters or arguments list for JavaFX application from JNLP.

param and argument tag are defined for applet-desc and application-desc, we should support those tags for javafx-desc.

<jfx:javafx-desc ...>
<param name="named-param" value="value1"/>
<param name="named-param-with-empty-value"/> <!-- do we need it? do we support same for AWT applet? --> no
<argument>arg1</argument> <!-- what we do with "special chars" like '<' ? -->
<argument>arg2</argument>
<argument>arg3</argument>
</jfx:javafx-desc>