customfilter 6.x-2.0-beta1

This is the first official release for the 6.x-2 branch.

Differences with the 6.x-1 branch:

• #501382: Add support for token replacements
• it requires at least PHP 5.1.0.
• the PHP code used as replacement text must refer to $customfilter, which is an object of class CustomFilter; if the code used before were $vars->test, now it must be $customfilter->test. The object also allows to access to any function made available from third-party modules, without to know if the third-party modules are installed; in the case they aren't, the returned value is always an empty string.