Add icon (#34)

* Add icon

* Add white background

* Switch to non-Dart specific icon

* Resize icon

Split up tests (#31)

Update readme and rev version

Release 0.0.5

Fix bug where decorations where not updated on switching of editors. (#…

…27)

* Fix bug where decorations where not updated on switching of editors.

* Changes as per review

Rev version

Rev version

Add publisher to package.json (#12)