Cleanup of framework's use of @package and @subpackage labels and additional of labels for classes missing packages.
Moved all GridField related components to the one name.
Countless spelling fixes, grammar for other comments.
Link ClassName references in file headers.
This means that you dont have to worry about casting it
as HTMLText again when using the result in a template or other context
However in some situations code might be assuming it can
check with is_string, in which case you now need to use instanceof HTMLText
The entire framework repo (with the exception of system-generated files) has been amended to respect the 120c line-length limit. This is in preparation for the enforcement of this rule with PHP_CodeSniffer.
