Merge branch 'release/EasySIMBL-1.6' into develop
Add “SimblPluginsForEchofon-1.4 is outdated” to README.md

Thanks @steakknife for suggestion.
I may use SimblPluginsForEchofon for testing compatibility.
close #11
Update README.md
Merge branch 'develop'

* develop:
  Update README.md
  Add “SimblPluginsForEchofon-1.4 is outdated” to README.md