Release/0.7.0 (ms-iot#637)

* Rev release version

* Update changelog and readme

Prepare for 0.6.9 release (ms-iot#534)

Prepare for 0.6.8 release (ms-iot#450)

Preparing 0.6.7 release.

Preparing 0.6.6 release.

Preparing 0.6.5 release. (ms-iot#367)

prepare for 0.6.4 release. (ms-iot#265)

VSIX package doesn't like the SVG asset. (ms-iot#177)

update version number

update documentation for 0.6.0 release (ms-iot#119)