Allow for Pagination

• Added the ability to perform pagination to ensure that users can get all results from the Buildkite API

Ability to query multiple build states

• We've added the ability to have multiple build states to your queries so you can check for Running and Scheduled builds (for example)
• We've also upped the standard items per page to the max 100

Completion of REST functionality

Added functionality to create and delete pipelines. This completes all REST functionality for the Buildkite API according to https://buildkite.com/docs/apis/rest-api

Initial Release

This release comes with almost all functionality. The unfinished functionality is DELETE requests and some pipeline API requests. These features are in progress and coming soon.