Implement support to send delayed push notification using .NET SDK.

[Julien-Mialon]

Hello,

This changed add the possibility to specify PushTime properties in ParsePush instance to be able to send delayed notifications.

[richardjrossiii]

I think I'd prefer this as a one-liner.

payload['push_time'] = state.PushTime.Value.ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ssZ')

[richardjrossiii]

Awesome, I love it!

Seeing as this is a public API change, I'll need to get some input from the rest of the team in terms of how this API will work cross-platform, seeing as this will be the first SDK to have this feature.

Similar to your other PR, the line ending stuff will need to be fixed up before we can merge (sorry!).

The code looks great overall, nice work!

cc @grantland @wangmengyan95 @stanleyw @andrewimm @nlutsenko @hallucinogen

[Julien-Mialon]

Hello,

Just fixed line endings and indentation issue. Got some trouble with git to do it so tell me if you prefer I create another pull request with only 1 commit with all modifications.

[richardjrossiii]

Awesome!

I've talked internally with the rest of the team and we will be implementing this feature across all platforms. That means it's a go-ahead to merge after it's been squashed.

No need to create another pull request. You can use git's interactive rebase mode to squash all of these commits down into one:

git rebase -i master

Next, in the editor, replace all of the pick commands (except the first one!) with fixup, and then use a force push to make those changes be reflected here on github.

Let me know if any of those commands needs more explanation.

[Julien-Mialon]

I rebased the repo, should be fine now.

[richardjrossiii]

100% awesome, thanks!