initial MIP added to spec

Done, with a few questions:


https://www.w3.org/community/xformsusers/wiki/XForms_2.0#The_bind_Element


I'm assuming that we agree that duplicate @initials to a node generate an 
xforms-binding error as with @calculate.


https://www.w3.org/community/xformsusers/wiki/XForms_2.0#Model_Initialization



https://www.w3.org/community/xformsusers/wiki/XForms_2.0#Error_Recovery_Outside_Actions



I'm assuming that


  For expression MIP values:
Upon expression errors for calculate or initial
the destination value is set to blank
xforms-expression-error is dispatched


that this does apply to @initial.


How about:


Upon binding errors with complex or readonly content (calculate only)
the instance value is not modified
xforms-binding-error is dispatched to the model


Does this apply to @initial as well?


Steven