Img2pdf-legacy-python

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- Avoid leaking file descriptors
- Convert unrecognized colorspaces to RGB

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- allow running src/img2pdf.py standalone
- license change from GPL to LGPL
- Add pillow 2.4.0 support
- add options to specify pdf dimensions in points

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- Initial PyPI release.
- Modified code to create proper package.
- Added tests.
- Added console script entry point.