add Mac & update GetPolicy
fix test
update PutPolicy
travis
update doc
fix
fix demo & test
Merge branch 'develop' into feature/1.0.2&1.0.1
remove unused code
use a photo which has exif info for testing
update make_base_url
remove unused import
Merge pull request #31 from SunRunAway/feature/1.0.2&1.0.1

Feature/1.0.2&1.0.1