Attempt to fix https://drupal.org/node/2199913: 'Undefined Index: theme_engine'
Bump PHP version requirement.
Add docblock and rename a parameter for Main::registerExtension() and Main::registerExtensionPsr4().
The ServiceContainerInterface should have a __get() method.
Fix hardcoded paths in DiscoveryTest::testWildcardFileFinder().
All module paths should be absolute, not relative to drupal root. See https://drupal.org/node/2162691
Fix autoload stack order in XAutoloadUnitTestCase, if the non-apc loader was registered in bootstrap.
Assert methods in simpletest should have a return value.
Remove unused method assertPublic() from XAutoloadUnitTestCase.
remove a class that is no longer used
Introduce a CommonRegistrationinterface for class finder and adpater, so they now share the most common registration operations like addPsr0(), addPsr4(), etc.
fix web tests
Fix web tests
Use dedicated exception if cache mode is not supported.
fix some undefined class stuff
Move everything to PSR-4 except some legacy compatibility
Big hairy rewrite/refactor, leaving no stone unturned.
Remove a debug print statement
Register modules as PSR-4 in addition to PSR-0.
DirScanner is not used at all in D7 version.
rename StreamWrapperClassLoaderTest to just ClassLoaderTest
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