Use native dialog box for credentials
Dynamically link to CredUI.dll for the application to run in both Windows XP and Windows Vista+.
Merge pull request #130 from ioannis-e/credentials

Use native dialog box for credentials
Sync the resources files after merging pull request #130.

I had completely forgotten I said I would do it.

Also remove now unused resources I didn't think of when reviewing.
Don't force any background color for the Shockwave graph.

This commit fixes #1747.
ISR: Render text subtitles relative to the video frame when in doubt.
Why "C:\tmp.srt"?
WebUI: Inform the web interface that no audio stream is available.
WebUI: Make use of new [hasaudio] info.
What the hell was intended here?!

Trying to make some sense of that code. Without much luck so far...
Fix: x86 and x64 versions conflicted over file associations.

4f465cf8b81f1da800b1bfc57cc48e317d24fbb5 was incomplete for Vista+.

This commit fixes #4064.
Auto mode for relative to.
Cosmetics: Use better IDs from the resource strings.