Fixed unsigned rational and signed rational extraction
Merge pull request #8 from jazzzz/fix-gps

Fixed unsigned rational and signed rational extraction
Added keywords
Added Makernote extraction for Fujifilm
Bumped to version 0.1.2
Code cleanup
Code cleanup as suggested in pull request #3
Changed error handling as suggested in pull request #3 and issue #7
Bumped to version 0.2.0
Changed finding IFD1, possible fix for out of memory issues
Added additional Olympus Makernote header
Changed and added available Makernote tags
Changed data output structure
Throw errors instead of strings
Optimized search for available IFDs
Added a GPS tag
Changed and added available Exif tags
Replaced single-quote with double-quote
Changed and added available Makernote tags
Bumped to version 0.3.0