Exit properly so that scripts can be chained ...

e.g.:

  bin\kill-drivers.bat && bin\node-setup\node.bat
Fix setup.bat for jrunscript, and separate config from the setup.js script.
Better browser detection for tests...

We ask the browser itself for its navigator details.

From this info we can get a better idea of the O/S used, so that we can
name our test result files and tests with more browser-specific names.

webdriver reports WINDOWS for XP and Windows 7, and I want to be able to
see which O/S the tests were run on.
Better usage info.
Remove useLoader as it's not required. And it also causes this error - https://github.com/theintern/intern/issues/122
Updated grid IP addr and available browsers.
Node setup config for *really* downloading the selenium artifacts.
Script to copy the generated site to the gh-pages repo.
Improve readme.