Improve IDL interface with instance mutation functions

In the most recent telecon, discussions about XForms Tiny revealed that we 
should consider adding to the XForms IDL interface functions that mirror 
the key DOM mutation events: insert, delete, and setvalue.

This way XForms Tiny could offer an alternative to writing event handlers 
that express ev:event="DOMActivate" (for example) that invoke insert and 
delete actions.

Instead, authors could write classic onclick handlers that invoke our 
functions to do the same work.

Cheers,
John M. Boyer, Ph.D.
STSM: Workplace Forms Architect and Researcher
Co-Chair, W3C Forms Working Group
Workplace, Portal and Collaboration Software
IBM Victoria Software Lab
E-Mail: boyerj@ca.ibm.com  http://www.ibm.com/software/

Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer