edx/edx-certificates — pull request #17 by stvstnfrd (2014-12-06 00:15:11+00:00)
Title: Fix --output-file option

When opening the file for binary writing, the file mode was incorrectly
specified.

The file can now be successfully written with:
```shell
python create_pdfs.py \
--output-file report.csv
--course-id 'edX/DemoX/Demo_Course' \
--no-upload \
--name 'Guido'
```