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Fixed PyPy cookie updating issue
Merge pull request #135 from Scorpil/master

Fixed PyPy cookie updating issue

Closes #132
Formatting
Corrected session info in the README.
Progress on --download.
--json with no data sets Content-Type as well

Closes #137
Cleanup.
Progress bar update
Download resume improvements.

- Set correct Range
- Validate respnse status
- Validate Content-Range

 #104
Improved Content-Range parsing.

  #104
Added Content-Range parsing tests.

  #104
Cleanup
Cleanup
Improved progress bar (#104).
Performance and progress bar improvements.

  #104
Handle KeyboardInterrupt while --download'ing (#104).
Used Content-Disposition filename (#104).
Tests
Added support for output redirection with --download (#104).