must run examples in Chrome

[nickdesaulniers]

From the readme:

For the JS tests: Open RunLayoutTests.html and RunLayoutRandomTests.html in Chrome

I'm curious, why do the examples/tests depend on one browser?

[vjeux]

Mostly because I only needed to test it against one implementation to make sure that it is correct.

@ryanseddon made the test suite run on Firefox as well, but apparently there are still some failing tests. Need to investigate what's going on
#43