added zlib1g-dev to installation requirements for debian
add requirement ebooklib to support epub format
implement epub_parser
add epub test file and corresponding checksum to test script
.epub documentation and changelog
fix broken hyperlinks
apparently tesseract 3.03 supports stdout!
checksum
checksum
updated installation instructions
Resolves issue #38

Use a different random tempfile for each processing job.

Also updates pylint score from 2.0/10 to 8.46/10.
Merge pull request #41 from christomitov/master

apparently tesseract 3.03 supports stdout!
merging in .epub support
merged #43
merging #44. fixes #38
updated changelog
updated installation instructions to remove the tesseract 3.03 requirement
updated installation instructions for Docker
merged #19
updating the contribution guidelines with a few things