v0.5.0-1

Highlights:

• high-level promise API
• privateFunction parameter in @call decorator
• payableFunction parameter in @call decorator
• includeBytes that helps factory contract

Commits:

• Merge pull request #206 from near/include-bytes 6ec568c
• Merge branch 'develop' into include-bytes 40c502b
• add missing file c2d098c
• add includeBytes "macro" that helps factory contract feac209
• private and payable functionality (#204) 5667584
• Merge pull request #201 from near/highlevel-promise 3d20fae
• add highlevel promise api tests d7c017f
• Add highlevel promise API 4116745

v0.5.0-0...v0.5.0-1