Tons of CS fixes;
Renamed constants and properties to be uppercased (as part of CS fixes);
Added "MAGENTA" as an alias of "PURPLE";
Added "\*_OFF" constants to StyleMapper;
Made StyleMapper inherit from Mapper instead of ColorMapper;
Reorganized folder hierarchy to be PSR-0 compliant;
Moved the "Color" class to the "PEAR2\Console" namespace, for PSR-0 compliance;
Added an Exception interface and an UnexpectedValueException inheriting from SPL, as per PEAR2 standards;
Made packagexmlsetup.php add a replacement task for what is now "GIT: $Id$" (previously, "SVN: $Id$") to the release version;
PEAR2_Autoload is declared as an optional dependency;
Made extrasetup.php add a version of PEAR2_Autoload during packaging, for the sake of easier installation.