GitHub Reactions API integration

[glasnt]

https://developer.github.com/changes/2016-06-07-reactions-api-update/

Still in preview mode, but once it's official, octohatrack should be updated to suit.

[glasnt]

This API now exists! https://developer.github.com/v3/reactions/

However, it would be one call per comment per issue/PR, so it's very heavy on the tokens.

[patcon]

At least for regular issues, seems it's been updated to be able to list all per-issue: https://developer.github.com/v3/reactions/#list-reactions-for-an-issue

(Still heavy for listing reactions to comments in code reviews and commits)

[Chandler-Song]

I am studying octohatrack and am stuck by some bugs. Kindly hope you can share some step-by-step tutorial or some demo code. Many thanks.

[patcon]

I'm not a member of the project, but perhaps you could share a tutorial yourself of exactly where you've gotten. That way, you'll not only help the next person, but those with experience where understand exactly where things went astray :)

[patcon]

EDIT: @Chandler-Song I moved my response into #105, since it's not quite related to this issue :)