Try to implements a case insensitive autoloader.
Merge branch 'master' into autoloader

Conflicts:
	tests/units/runner.php
Improve autoloader.
Merge branch 'master' into autoloader
Reset stat cache.
Omptimize autoloader.
Remove useless call to preg_replace_callback().
Add and use autoloader::init().
Use serialize() instead of var_export() to send autoloader to PHP.
Replace '\' with '/' in path if DIRECTORY_SEPARATOR is '\’.
Use serializable interface.
Add cache file to autoloader.
Remove useless method.
Classes directory is now by default in autoloader.
Merge branch 'master' into autoloaderCacheFile
Optimize absolute class name detection.