117 adding kepler handler

[zenon18]

Completing issue #117 by adding a Kepler Handler that generates a kepler.json file that one can import into Kepler.gl

[jhoshiko]

Nice! Pulled these changes in and tested the results on kepler and everything seems to be working on my end. Curious to hear what @robfitzgerald thinks!

[zenon18]

[robfitzgerald]

looks great, runs locally just fine for me. thanks for handling SimTime serialization along the way, the types and tests.

i did try dumping it straight into kepler and it does work but it's not obvious how i should play with the settings to get things to be pretty, i totally forget how i did that 🤦 but psyched now that we have this, i can get back to exploring that and we can get some nice ooos and aahhs when folks land on the readme.

thanks for all of your work, i hope you enjoyed figuring this one out!

[zenon18]

@robfitzgerald we noticed with the 1970's data you want to have the trailing length needs to be 1, we noticed the later data (say putting 2023 instead of 1970) you can use higher trailing lengths (like 180+)