check $evald before checking is_array()
checking length not needed
parseEnd() does not need to return match
parseExtend() is the only primary function that returns an array
carriage return replacement not needed
remove ctype_space
releaseMemory() no longer used internally
use ruleset_id for find()
rename Node folder to Tree for psr-0
rename visitor classes for psr-0
rename visitor classes for psr-0
add Replacing.php
exception classes for psr-0
exception classes for psr-0
mixin classes for psr-0