First reminder email should be after the time period

[annashipman]

I set up my habit on Sunday night (i.e. yesterday) - I want to run twice a week. Got an email this morning asking me if I'd done it. Crikey, give me a chance!

1. The first email reminder should be after the time period you've set.
2. Also, since we agreed that the week starts on Monday, what if you set up the habit on Wednesday? When does your reminder come?

2 could be irrelevant - I haven't looked at the code as I don't have time right now but if I have time later I'll take a look.

[annashipman]

This has now become a blocker - I got a reminder this morning about the upcoming week. I want to fill in for last week, but I can't, because I don't know yet what to put for the upcoming week.

I meant to take a look at this today but have not had time.

[annashipman]

Fixed by fix for #40