Update README.md - Add Distributed Execution Platforms.

[MichalCz]

Hi there!

I'd like to add Scramjet Platform to the list. The reasoning is that it fits at least two of the three criteria you mentioned (full disclosure: I'm the author, so I can't claim regardless of my personal opinion). The software has won three awards since full launch, at: CloudX, API World and DeveloperWeek conferences.

I'd also like to propose to add the "Distributed Execution Platform" category, as our platform is combining some features of stream processing (the software model is based on delivery of streamed data between programs in remote environments), remote execution and workflow platforms and can't be reasonably pushed to a single one of the current categories. I believe Temporal would actually fit quite closely with Scramjet, as through a different set of features they also offer similar value.

I do see the gentle reminder, but we're still small and additional visibility would let us continue bringing a fully featured solution to the open source community, and additional justification to our backers to fund the effort in that direction.

Please let me know of any suggestions and additional information to provide.