Crawljax can now pass through basic authentication.

Closes #246
Moved the test to the correct pacakge
Upgraded and moved around JavaScript files
Removed unused plugins
Fixed test
bugfix: modify JarRunnerTest to remove dependency on system-specific newline code
Merge pull request #265 from crawljax/fixes/basic-auth

Crawljax can now pass through basic authentication.
Merge pull request #266 from crawljax/clean-up

Clean up
use System.lineSeparator() rather than removing system-dependent line break code as disucussed in https://github.com/crawljax/crawljax/pull/268
Merge pull request #268 from daisy1754/fixes/267jar-runner-test-newline-code

Fix for issue 267: JarRunnerTest#assertHelpWasPrinted fails on Windows