Support Date, DateTime

[fchorney]

Hi,
First off, thanks for making this package!

I am wondering if you would be open to adding Date and DateTime support to this package, as I would like to use Infinity as an unbounded date for date intervals.
I guess we would need to expand on the InfExtended datatype, or even make something else such as InfDateExtended.

Would you be open to taking a PR that adds this support, as I would love to start working on such a thing right away.

Thanks!

[cjdoris]

Thanks. I've just seen your thread over on Intervals.jl --- that's basically the reason I made this package! Maybe they'd be open to linking to this package from their documentation...

Anyway yes, it makes sense to have infinite times. Probably we need a new extended type, something like InfExtendedTime{T<:Dates.TimeType} <: Dates.TimeType (analogous to InfExtended{T<:Real} <: Real). Feel free to make a PR and I'll take a look.

[cjdoris]

@fchorney If you're working on this, please note that the representation of InfExtended will be changing: #4 (comment). Please give InfExtendedTime the same structure. You can reuse InfFlag.

Also I'm going to restructure the code sometime as in #5, so it would be helpful if you put all your new code into a infextendedtime/ subdirectory. Thanks!

[fchorney]

Ok sounds good. Thanks for the heads up!