v1.0.2

• Better filename guessing logic specifically for cases where filename extension is not included in the URL. For example:
  https://r3---sn-vgqsrnes.googlevideo.com/videoplayback
  previously returned videoplayback as filename. It now returns videoplayback.mp4 by guessing .mp4 extension from HTTP headers.

v1.0.1

• added ability to guess filenames based on content-type header

v1.0

First fully working version.