- add guava dependency to detect charset
- improve error reporting in case no file is found
- fix the interface to exiftool that in windows cannot address filenames in UTF-8 format:
-- @link(http://perlmaven.com/unicode-filename-support-suggested-solution)
-- @link(http://stackoverflow.com/questions/18893284/how-to-get-short-filenames-in-windows-using-java)
- switch logger to info
- add a test for UTF-8 filenames in windows
-? still to be done: windows detection