Enhance validation report message by adding the name of the property being validated

[lauterry]

Hi

I think it would be a good idea to add the name of the property being validated by the schema 'json-schema-draft-03.js' in the friendly error message.

For now, if a json property such as 'address' for example does not respect the defined maxlength, the following message is :

String is greater than the required maximum length : 2 .

It would be more revelant to have a messsage such as :

Property [address] of type [String] is greater than the required maximum length : 150

This message can help us debug application by providing the name of the property which failed the validation.

Best regards

Thierry LAU

[alfonsoabad]

I've created a branch in my fork https://github.com/alfonsoabad/JSV/tree/descriptive-errors with those descriptive messages implemented for draft 3 only, I'll be doing the pull request once it's tested, may be you can help me to test.