Added alternate way to instantiate validator

[benkeen]

The current code requires you to pass a file path when constructing the Validator; however, sometimes you don't have the schema in a file (e.g. it's in a database). This offers a second way to instantiate it, by passing in the raw JSON schema, and specifying it as "json" instead of a file location.

[benkeen]

Hi Harold, not sure if this is of any use, but it's all yours if you want it. :) I updated the Usage section of the README to show an example of how it works: https://github.com/benkeen/php-json-schema

[pettazz]

I opened #15 before I saw this, so :thumbsup:

[agwidarsito]

+1 to a good feature.

[agwidarsito]

Anyone looking after this repo, merging pull requests?

[pettazz]

Doesn't seem to be

[agwidarsito]

@hasbridge Can you assign another admin if you're not able to look into these? So we can continue to help this library evolve? :)