Merge pull request #18 from guardianproject/harlo_feature_2286

standard wrapping for j3m metadata
enable GPS preference option
Merge pull request #19 from n8fr8/master

enable GPS preference option
add new method to get j3m data directly
Merge pull request #20 from n8fr8/master

add new method to get j3m data directly
Merge branch 'master' of github.com:guardianproject/InformaCam into harlo_task_2290
removing extra drive cruft, adding in some stuff mikael included.