Display a blocker type error if PHP parsing fails
Turn renderers into processors

Turn the renderers (except for the underlying AnalyzerRenderer) into 'processors',
which are given a Node (or subclass thereof; or filename, in case of
FileRenderer) object at construction time, and whose sole purpose is then to
make information available in a way that can be easily represented by
AnalyzerRenderer.
Rename renderers to processors, and move files accordingly
Clean up PHPDoc strings
Handle method and static calls separately from regular function calls
Remove vip-scanner/class-token-parser.php as it's obsolete now
Add a class methods processor