Ability to skip a job

Hi,

I'm creating a pool of tasks which can be run or not (depending on the weather).
I would like to skip a particular run of a job without lost history of previous run.

I was thinking to do it like that.

``` python
def func():
# this time, the job should not be done,
# but must stay in the schedule queue for next time
# This must keep last_time property unchanged,
# and update next_time property
if something():
return schedule.SkipJob

# normal running
do_something_else()

schedule.every().day.do(func)
```

What do you think?

Cheers,