Arcblock hosting Hackathon and distributes getting started guides

[ArcBlock]

Hi all,

we are happy to announce our second hackathon event to build and create decentralized apps on ArcBlock's development platform and as part of that, we are releasing a wide range of getting started materials.  Check out https://www.arcblock.io/post/2018/07/30/ocap-playground-intro/ to see one of our first applications using our OCAP service.  We would love your feedback.