Show unit test section if we have this available

Contains link to start unit test and DIV to contain result stats as they
run
iFrame added to run unit tests within
object.watch polyfill lib
Start of unit tests

Tests 4 things for now - opening, updating, saving & closing
Needs a lot of refining, but the basics of testing and also waiting for
tests to return and failing after 10 secs of waiting are all there
Initial text file used in unit tests