Made email validation case-insensitive
Prevent invalid 'required' field being saved to model if its already set value is not undefined.
Add digits validation rule

This rule will only allow a positive integer number.
Merge pull request #21 from spmason/patch-1

Made email validation case-insensitive
Added digits test to original branch
Test that 'undefined' won't be saved for required field. A small typo corrected from 'maxlength' to 'minlength'.
Merge pull request #27 from jtollerene/patch-1

Add digits validation rule
Merge pull request #26 from akhabibullina/fix_setting_invalid_required_value

Prevent invalid 'required' field being saved to model if its already set...
fixes to make it work on the server or with browserify
required can be set to false
added a bunch of validators
Merge pull request #32 from sebpiq/ad035ecb54e9a895833bba87cc34c3787118f52c

fixes to make it work on the server or with browserify
Merge pull request #33 from sebpiq/master

Added a bunch of validators
Updated Backbone.Validations to work with the new Backbone validation style:

- Re-use & extend the default Backbone.validate function instead of re-implementing
- Raise 'invalid' events on error as 'error' is reserved for xhr errors
- 'error' callback is not called on validation errors
- To get validation to fire on 'set', call with {validate: true} in unit tests
Merge pull request #34 from spmason/backbone-0.9.10

Updated Backbone.Validations to work with Backbone 0.9.10
Update README.markdown