[VideoIUA] Add new extractor for video.i.ua

[g00dy22]

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What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

Added extractor for videos from video.i.ua. Supports video pages like http://video.i.ua/user/4916778/59823/455241/

[dstftw]

Covered by generic extractor.

PS C:\dev\youtube-dl\master> py -2.7 .\youtube_dl\__main__.py http://video.i.ua/channel/528/405379/
[generic] 405379: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 405379: Downloading webpage
[generic] 405379: Extracting information
[download] Downloading playlist: None
[generic] playlist None: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[download] Destination: Airbats 801 TTS 03 of 07-405379.flv
[download]   0.1% of 295.35MiB at 306.12KiB/s ETA 16:27
ERROR: Interrupted by user