Added tests for Imagemagick. Values for image01 updated. Minor tweaks to the rest of tests.
djvudump tests added. New test image: 05.djvu
Added exiftool tests [image01 image14]. Refactor of methods into TestHelper. Updated test context values. Values to be normalized or ignored are at the top of ignoredProperties.
Actual changes, see last commit message
Refactor all tests to just have one loop. Updated working specialProperties and a ValueTester interface opening for more special properties to be tested easily.
Profiler report added to index
Merge pull request #16 from Differ-GSOC/image01-test

Image01 branch
Merge remote-tracking branch 'upstream/master' into anonymous_interface