Run the Sign function in an STA thread to be able to sign js files

[air2]

Implements the fix proposed by @engycz in #169

[vcsjones]

Interesting. Thanks for the fix. I am going to play around with this locally first to make sure I understand.

[ncook-hxgn]

bump?

[eponerine]

Bumping for update. Hopefully this can make it into the next release.

[vcsjones]

I haven't forgotten about this pull request. I do have some concerns about spawning potentially 1000s of threads. I realize that with the Join there will never be more then MDOP number of executing threads, but constantly creating and destroying threads makes memory usage a tad high.

Right now I am experimenting with a custom TaskScheduler for Parallel.ForEach instead. If I put together a branch with a task scheduler would folks be willing to pull it down, build AzureSignTool, and give it a try?

[eponerine]

Sure thing! We're already running @air2 branch "in production" and its working. We are willing to try an official release so we don't have to maintain our own copy of code internally.