Not honoring value="" is a big showstopper.  Easy to support it.

used in combination with any framework that has Form objects that repeat output into value="" as is customary, changing value="" to data-number="(number only value)" is pretty painful.  These two quick lines make this a happy citizen in ZF2 for example.  Hope it helps -- and nice work.
Merge pull request #123 from Saeven/master

Not honoring value="" is a big showstopper.  Easy to support it.