src/reflection.php: Add function 'identifyClassOrType', which is generally for outputting type/class info about what's stored in a particular variable, without the need to do something like "if (is_object($x)) yada yada".
src/dates.php: Use new 'identifyClassOrType' function to generate exception message.
src/webapp/: Add new mechanism for creating and specifying "filters" for web framework, and create a first filter for guarding against CSRF attacks (which, as of now, is not enabled by default -- will let it see more testing first).