Add time parameter to send-time

[rhetenor]

Hey,

Wanted to set a custom time for keeping track of projects I'm working on. The infrastructure is there but there was no CLI interface for it, so I quickly hacked it in.

With this send-time now takes an optional time argument which is parsed by dateutil (already part of project dependencies).

Thanks for the project!

[kbrddestroyer]

That's not needed since you use dateutil.parser.parse(time)

[kbrddestroyer]

import should be

from functools import wraps
import dateutil

[kbrddestroyer]

Needs minor changes to pass codestyle checks

[rhetenor]

Only importing dateutil is not enough, it does not import the parser class.
I thought only writing parser.parse(time) is a bit too ambiguous naming, but yeah it obviously creates an unused import. Sorry for not running the tests, it was a bit late at work!

Fixed the unused import by removing it and only calling parser.parse