Change all tests to only load one iframe at a time

Running the "all" browser tests is effectively unusable on large test sets because the competing IFrames cause each other to timeout.

The new "all" page isn't very pretty, but it will only load one test at a time and will report the results as a basic pass/fail so that you can drill into each test without having to scroll through a huge page to find the result. I want to add the individual test stats next, but this at least has the functionality working.

Also fixed an issue where phantom crashes because of included stylesheets.