v0.4.0-rc2

• added links to documentation for all methods and entities
• implemented custom format array arguments (f.e. for defining polls)
• FileUpload helper for easy file uploading (f.e. media attachments and profile pics)
• better handling of methods with custom response formats
• more tests
• updated readme and examples
• various (bug)fixes and refactors

Full Changelog: v0.3.0-rc1...v0.4.0-rc2