Add the version into all links in the docs if it exists. (#4334)
Add the version into all links in the docs if it exists. (#4334)

* Add the version into all links in the docs if it exists.

* Fix whitespace (lint)

* Use marked link renderer to properly sanitize links

switchinnovations/pxt,switch-education/pxt,switch-education/pxt,switchinnovations/pxt,Microsoft/pxt,Microsoft/pxt,Microsoft/pxt,switch-education/pxt,switchinnovations/pxt,switch-education/pxt,switch-education/pxt,playi/pxt,playi/pxt,switchinnovations/pxt,Microsoft/pxt,Microsoft/pxt,playi/pxt,playi/pxt