Updated cache docstrings
Added filters
Updated validators to reflect requirements
Updated di docstrings, renamed PropertyInjectionProcessor to AttributeInjectionProcessor
Updated events docstrings
Updated http doctrings
Updated fields docstrings and test cases
Added StripTags filter, and solidified form/field code
Html entity encoding/decoding
Moved TagMixin and flatten_attributes to new module, updated forms and relevant tests
Updated forms docstrings