Add JSON Serialization

Non-breaking changes

• Exposed the CuriousObject class to consumers as CuriousObjects.defaultType
• Added object method toJSON to CuriousObject, which allows JSON.stringify to correctly
  serialize them
• Added static method fromJSON to CuriousObject, which allows easier parsing from strings into
  CuriousObject instances

New camel-casing features

Non-breaking changes

• Added a camelCase flag to the CuriousClient constructor, which makes the objects constructed from the Curious query have camel-cased properties and relationships, rather than snake-cased ones: i.e. foo_bar becomes fooBar. This is a convenience for style and legibility, since most javascript applications use camel-cased property names as well: now, instead of having to think which kind of object you have when referencing a property, you can just treat all objects alike.

Fully working `iron-ajax` wrapper

Bug fixes

Previous attempts to make a wrapper for iron-request elements were ill-fated: iron-request elements can only represent a single request. To hold multiple requests, iron-ajax elements must be used, which generate requests as many times as necessary.

• wrappers.ironRequest has been replaces with wrappers.ironAjax

Minor bug fixes

Bug fixes

• Work around bug in <iron-request> docs that does not describe proper serialization of POST request body.

Minor bug fixes

Bug fixes

• Fixed incorrectly named property in ironRequest wrapper.

Wrapper improvements

Non-breaking changes

• CuriousClient.wrappers.ironReuquest takes in a Polymer iron-request element object and
  returns an appropriate POST request-making function
• all of the wrapper functions now take an optional options argument to merge
  in object sent to the request client, for providing additional,
  client-specific options.

Expanded and updated wrapper functions

Breaking Changes

• CuriousClient.axios_post has been renamed to CuriousClient.wrappers.axios

Other changes

• Added CuriousClient.wrappers.angular
• Wrappers now default to global variables if a module object is not provided.

Initial release of Curious 2

A complete rewriting of the javascript client from version 1:

• create CuriousQuery class for structured queries
• all classes, methods, and properties are meaningfully-named: CuriousQ is now named CuriousClient
• move to promises-based API rather than callback-based API
• removal of curious-xhr in favor of using an existing library, like axios or another http request framework
• full suite of unit tests
• conforms to camelCase coding convention
• JSDoc for all symbols