NANs are never equal, fixes #750
Fixes #796 and sebastianbergmann/phpunit-mock-objects#116

 * Fixed a call-time pass-by-reference issue exposed by de6d32a.
 * Cleaned up some slightly obfuscated code.
Make the fatal-isolation test work in most environments.
Update dependency information for PHP_Invoker and PHP_Timer
Merge pull request #800 from whatthejeff/fatal_isolation
Upgrade PHPUnit_Selenium
Ignore .idea
Merge pull request #799 from whatthejeff/issue_796
Merge pull request #751 from asm89/fix-nan-behaviour