Fix importing HARs from fiddler

[paulirish]

I wrote this patch a year ago. It's not very good quality, but I think it worked.

Fiddler was missing the page entry.
I would not merge this PR directly, but if someone is trying to fix chromeHAR to make it great again... then this should probably fall into scope. :)

[ericduran]

Hmm, I've been meaning to get back into this. I should honestly just re-write it :-| Lets see if I can find time. I think with the new stuff on the web now this can probably be a full on web app with some really nice features.

That being said I constantly go back and forth on whether I should re-write this or just incorporate it into chrome dev-tools. 😢 I can't pick.

[ericduran]

I did some testing today and I might be able to create a much cleaner har-viewer piggy backing on all the work the DevTool team did. It's a much decouple/browser compatible tool now.

Also I was thinking more of a https://github.com/ChromeDevTools/timeline-viewer so har-viewer with the same kind of idea. This will resolve all the open issues and new features I wanted to add.

hmmm.