Introduce AlertTypeNone, enableDebug and forceAlert

[jedi4ever]

This PR enables:

• AlertTypeNone: in our case we don't want to have an alert for Patch update only for Minor and Major
• setEnableDebug: this logs the json & URL used to connect to the iTunes store. Handy if you are tracking why it can't be find a version
• setForceAlert: sometimes you want to see the alert regardless what your app version in the appstore is. This allows you to force this. Handy if no version are in the Store yet.

[ArtSabintsev]

Hey @jedi4ever: Thanks for the PR.

I'll take a look at it today in detail when I have a bit more time.

[jedi4ever]

@ArtSabintsev any update? thanks for your time.

[ArtSabintsev]

Yes. Will look at it tonight. Got hung up with my main project. I need to push an update to Harpy as is, so I'll bundle them together.

[ArtSabintsev]

Sorry - didn't get time this evening. Will do it first thing when I get into the office.

[ArtSabintsev]

So I took a look at the additions. Something in there breaks the lib's functionality - i.e., the alert never pops anymore. If you fix it, I'll take a look at it again.

Closing the issue now.

Also, I will add in HarpyAlertTypeNone and the enableDebug on my own with pulling the request. I'll credit you in the change.

Thanks for those additions.

[ArtSabintsev]

Oh you know, what, nevermind. I think I broke something when I was adding my own change. Reopening it.

[ArtSabintsev]

Pilling this request, but overriding it with some changes that I've made locally. I also removed the forceAlert option, as I didn't really like how it was implemented. I may add something similar down the road.

Your name was added tot he README and CONTRIBUTIONS list.

Thanks for your help!

[ArtSabintsev]

ok, all done. Everything is now live!