Get Query parameter validation

[ty10r]

Get endpoints should all have validation on their query parameters.

• create query parameter validation functions
• create mapping between parameter types and their validation functions
• in ApiProxy.prototype.makeRoute call each validation function on parameters, using the mapping

Title only says Get Query Params, but I will leave this here because it will use the same code:

• in ApiProxy.prototype.makeRoute call each validation function on POST parameters

[ty10r]

Look into the raml-parser output, this may require me to create validators based on the base types, but something tells me the parser separated data types for me :)

[ty10r]

Closing the issue for now, POST parameter validation is out of the scope of this project for now because of issue #3