Update default filename for createMovie and createScreenshot

[nabobalis]

With #73 and #77, the default filename(s) will be of the form: f {res['id']}_{startTime.date()}_{endTime.date()}.{format}"

I think it would be nicer if we could autocreate the names of the instruments used in the movie instead of using the movie ID.

[akash5100]

This is example of getMovieStatus response:

{
  "frameRate": 15,
  "numFrames": 300,
  "startDate": "2014-02-03 20:26:16",
  "status": 2,
  "endDate": "2014-02-05 20:16:40",
  "width": 846,
  "height": 820,
  "title": "SDO AIA AIA 1600 (2014-02-03 20:26:16 - 20:16:40 UTC)",
  "thumbnails": {
    "icon": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/preview-icon.png",
    "small": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/preview-small.png",
    "medium": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/preview-medium.png",
    "large": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/preview-large.png",
    "full": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/preview-full.png"
  },
  "url": "http://api.helioviewer.org/cache/movies/2014/02/05/VXvX5/2014_02_03_20_26_16_2014_02_05_20_16_40_.mp4",
  "statusLabel": "Completed"
}

Is res["title"] good? What's your take?

[nabobalis]

I want something like that but you would need to remove the whitespace at the very least.