* Use pytential branch

* Refactor E2P

* try new loopy branch

* fix formatting

* disable domains check

* register only if not found

* Move kernel_scaling to the outer kernel

* Refactor P2E

* Use loopy main

* re-enable implemented domains check

* Rename some loopy kernel handling functions

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Co-authored-by: Andreas Kloeckner <inform@tiker.net>