expose Instance.GetMasterScope()

update go.mod/go.sum (project-flogo#126)

improve error message while activity not import (project-flogo#124)

* improve error message while activity not import

Fix loop delay field to support app property (project-flogo#123)

update go mods for release (project-flogo#114)

* update go mods
* remove unused module

Enhance the error message (project-flogo#113)

* Reporting clear msg when something wrong

* add error handle error message

* refactor error message base on feedback from Frank.

* lost one error message base on feedback

* update error handling for schemas

iterate/doWhile config fix; update doc (project-flogo#111)

* iterate/doWhile config fix; update doc

* add iterator to test json

* temporarily remove invalid tests

* fix retry and loop config nil issues

keep previous order that expr otherwise running first

fix subflow go.mod

update go.mod to latest release