match no-leading-zero floats, e.g. '.2', as a number

[benmathes]

Related to issue https://github.com/thedersen/backbone.validation/issues/340

[blikblum]

This is fixed in a fork i'm maintaining (tried contact this repository admins without luck): https://github.com/blikblum/backbone.validation

The updated package can be found at https://www.npmjs.com/package/backbone.validation

To use with node: npm install backbone.validation