v1.0.0 Final Release

Hi community,
This is the first official release of Golang SDK. Enjoy!

Requirement:

iWF server 1.1 +
It also runs with 1.0 version of iWF server, but some feature will be missing.

What's Changed compared to

• Bugfix: get search attributes with more tests by @longquanzheng in #19
• Initialize the project with IDL and interfaces by @longquanzheng in #1
• Define all interfaces and structs for GoSDK by @longquanzheng in #3
• Add workflow registry implementation by @longquanzheng in #4
• Client: Implement start workflow API by @longquanzheng in #5
• Implement Get Result API by @longquanzheng in #6
• Implement basic feature and test framework by @longquanzheng in #8
• Implement Timer by @longquanzheng in #9
• Implement Signal command and add test for workflow options an untypedClient by @longquanzheng in #10
• Implement interstate channel by @longquanzheng in #12
• Refactor to add UnregisteredClient by @longquanzheng in #13
• Implement persistence by @longquanzheng in #14
• Add reset API by @longquanzheng in #15
• Add init search attributes when start workflow by @longquanzheng in #16
• Add search and describe workflow API by @longquanzheng in #17
• Add get search attributes and data objects APIs by @longquanzheng in #18