Code Cleanup

[voegtlel]

Hi there,

first, thanks for quickly adding the decode_header function! :)

Just a small note: The arguments pixel_format=TJPF_BGR, scaling_factor=None seem to be unused for the decode_header, so I guess they could be removed?

Best
Lukas

[lilohuang]

My bad, too rush, will fix it soon. :)

[lilohuang]

Please give a try with the new version (1.1.5), and thank you for your feedback.
e.g.
pip install -U git+git://github.com/lilohuang/PyTurboJPEG.git
or
pip install -U PyTurboJPEG