Test Exif Make/Model
Fix test macros
Remove Coolpix 5700 from testsuite: the file wasn't what it was supposed to be.
Implement 'Make' exif metadata for CRW.
Fix Exif in MRW: use the exifOffset in IfdEntry::loadData().
Add MakerNote support and tests.
Merge branch 'test-exif'

Test Exif
Fix MRW Exif support.
Fix CRW Exif-like metadata