Bugs Found with Windows

[SeanIsYoung]

Error 1:

• When running the application in a windows environment if zxing fails to identify the barcode, the return value does not include the file URI and the raw value is set to an empty string instead of None.
• Don't have a windows environment available at the moment to provide an example of this. But the error is being cause by:

python-zxing/zxing/__init__.py:183: if l.endswith(b': No barcode found\n'):

• This is because lines on windows end with \r\n and so the statement isn't matched.

Error 2:

• The application is unable to parse results when the file is held on a network share. And results in a index out of bounds error at:

python-zxing/zxing/__init__.py:150: file_results[-1] += line

This is because the preceeding if statement uses b'file:///'. A pattern which is specific to local file paths. As indicated here it should be b'file://'.