#260 [PATH] CssClassFilter that works

<div class="class1 class2"></div> is valid CSS, but CssSelectorNodeFilter doesn't handle this situation since it simply uses HasAttributeFilter internally. The attached CssClassFilter implementation splits the class attribute by whitespace and checks each class individually, meaning that CssClassFilter("class1") would actually match the div in the example above. Source code based on HasAttributeFilter is attached.

[Anonymous]