Added failing test cases for check/choose callback regression.
undoing errant regression tests because I forgot to branch for the pull request
Updating Browser.fork() tests to reflect updated Cookie API.
Updating Browser.fork() to reflect recent location updates.
Enabled Browser.fork() tests.
Re-implemented Browser.saveCookie and Browser.loadCookie.
Browser.fork() skipping duplication of history for now (and associated test suite is now skipped)
Merge pull request #516 from getwindchime/fork-fixes

Fork fixes