Issue #2189345 by benjy, sanduhrs, Mile23, joshtaylor, jbekker, David_Rothstein, klausi, sun, zaporylie, pfrenssen, jsacksick, jibran, Mixologic, znerol, Xano, alberto56: run-tests.sh should exit with a failure code if any tests failed

Issue #2551981 by jthorson, Mixologic, Fabianx, David_Rothstein: Add --directory option to run-tests.sh test discovery

Issue #2310415 by cilefen, ednawig, TravisCarden: Fixed run-tests.sh does not handle the error when invalid test groups/classes are specified.

Issue #1693398 by donquixote, pounard, sun, Sylvain Lecoy: Allow PSR-0 test classes to be used in D7.

This reverts commit 132aed37.

Issue #771448 by Damien Tournoud, attiks: Changed Use proc_open() instead of pcntl_fork() in simpletest.

- Patch #602332 by Steven Jones, pwolanin, Steven Merrill: XML output option for use with Hudson / JUnit.

#679890 follow-up by Bojhan, aspilicious, and agentrickard: Remove more extraneous 'Please' in the interface.

#606526 by axyjo and scor: Remove trailing whitespace and add newlines at end of files. Sorry, folks! But it is after code freeze. :)

#517814 by jmstacey, justinrandell, pwolanin, drewish, Jody Lynn, aaron, dopry, and c960657: Converted File API to stream wrappers, for enhanced private/public file handling, and the ability to reference other storage mechanisms such as s3:// and flicker://.

#193383 by TheRec, JirkaRybka, and Bart Jansens: Centralize calls to set_time_limit() and prevent warnings/errors.

#376129 by boombatower, Damien Tournoud, and chx: Change getInfo() to a static method to reduce memory footprint of SimpleTest.