Merge pull request #38 from n8fr8/master

fixes for jpeg hashing
change tag so it is easier to filter on "*" is a wildcard char
when possible use streams instead of byte[] arrays
adding in Matthias Mann's JPEGDecoder
improvements on media import/export and JPEG hashing fix
Merge pull request #39 from n8fr8/bugs_fixes_with_media_hashing

Bugs fixes with media hashing
remove audio from md5 video calc for now