update README
Merge branch 'rest-api' of https://github.com/amb43790/Devel-hdb into rest-api
Fix bug finding tab's ID

Only .tab-pane elements have the ID it's looking for
Several bugfixes for setElementHeight

* Better way to determine when a code pane is not currently visible
* Pass correct args to whenStackTabIsShown()
* If we're delaying, don't fall through to the rest of the function
refactor to pull out the new height as a variable
extract function to scroll a code table line into view