Add list and apply decisions api

Merge pull request #6 from otothea/feature/apply-decisions

Add apply and list decision api

Remove API version and add init validations

• Found the return_action documentation - MORE INFO
• Remove support for api version option - will only be supporting the most current version v203
• Add validations for all init options

Add all API support and webhooks

• BREAKING CHANGE: Consolidate init args into one options arg
• Add support for return_action in init options - this is undocumented by sift science and is not commonly used
• Add support for device fingerprinting api
• Add support for partner api - NOTE: I do not have a partner account with sift science, this is untested. Please report any bugs.
• Add CONSTANTS object to siftscience object for things like $reasons and $shipping_method
• Add express/body-parser webhook support
• Add a minimal test package

Add support for $link_session_to_user event

0.0.8

bump package version for npm

Fix get score response and update readme/package

0.0.7

Fix the promise response for scores

Refactor and fix promise responses

0.0.6

Update package version

Add support for regular async callbacks

This is useful for people who don't use 'yield' or 'promise'.

Add support for all Sift Science Events

0.0.3

Update package version and keywords

0.0.2

update lib and readme