addnode 5.x-0.9

Fixes:

• Fixed name conflicts on form
• Subforms processed
• Correct subform is chosen for processing
• Whole subform now visible rather than just 'basic' subform
• Unexpectedly $op=='form' in the call to the function fixed
• Something breaks in submission - probably in validation? (but it silently fails...) fixed
• Submitted form was handled by the subform handler! Fixed by replacing drupal_prepare_form with home-made code.
• Added node is selected from the list once it's made
• Multiple addnodes work on the same form
• Other tweaks and fixes

Still a few bugs to fix, hence not at v1.0
It should function well enough to test though.