* pulling in diverge tm2 from staging branch
* cleaned up comments, docs, licenses
* refactored apparent grid to make 2u spacebars more obvious
* various delinting from noroadsleft review
* most of drashna's feedback responded to
- lots of lint swept
- used more modern tri-layer functions
- still need to adopt modern split support.
* switch to common split code. remove comment cruft
* tapping force hold makes LT way more usable for rapid , sequences
Drashna Jaelre