BugFix request.py 

I found a bug in image reading when uri is file object.

This program demonstrates it:
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import imageio

path="C:\\1.jpg"

fl=open(path,'rb')

imageio.imread(path) # OK
imageio.imread(fl,format='jpg') # OK
imageio.imread(fl) # ValueError: Could not find a format to read the specified file.
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Maybe this is not the best solution, but it solves the problem on pyzo2014a win7.