TypeScript + Better Time Formatting!

Hi all!

In this release I've migrated to using TypeScript for added stability and code organization.

In addition to this, I have provided more options for rounding time (see README for info) as well as a new monitored condition:

Remaining

This condition shows how much time is remaining, whereas ETA shows when the print will finish. Using the option round_time will change the displaying of this condition (as well as for Elapsed) from an exact amount to a fuzzy, human-readable format.

Thanks again for all your support!