Time expression demo

Hello everyone,

An interactive demo for a small part of our time stuff and schedule handling library is available here: https://daypack-dev.github.io/time-expr-demo/

Time expression is in essence a language for specifying time points or time slots precisely and concisely, while trying to mimic natural language.

The implementation of the demo core itself can be seen here: https://github.com/daypack-dev/time-expr-demo/blob/master/src/demo.ml , where the usage of Daypack-lib is shown.

Lastly, the library is still a prototype, so expect some faults in the outputs of the demo here and there.