* add extension framework

* add filter transformer

* more logging

* adding more tests

* make stats an extension

* make stats an extension

* test registry init

* first get a function, then call it

* move files to data package

* not used

* update to columnar

* Add more tests for nameMatcher

* Fix invert predicate

* add fluent API

* remove calc snapshot

* split Field matchers and Frame matchers

* split filter transformers

* Fix typo