move starting of static server to live dev start time and fix up some comments
Merge remote-tracking branch 'origin/master' into jrb/issue-2987-2988

Conflicts:
	src/extensions/default/StaticServer/main.js
move node connection to init code
update docs, make it so unit test code can always get the _staticServerProvider
minor fixes from code review
Merge pull request #2993 from adobe/jrb/issue-2987-2988

move starting of static server to live dev start time and fix up some comments