done UT about large file cache && use file:sendfile.(TODO:IT)
done IT. close leo-project/leofs#55, close leo-project/leofs#70
fix bug which can't download a multipart object correctly
remove debug codes
refactor handling large object
impl list objects in case of over max-keys objects stored
Change leo_cache's branch for the test
Format codes
fix to handle GET with Range header correctly(TODO: UT/IT)
Upgrade leo_redundant_manager to 0.12.20
Format codes
done UT/IT to handle GET with Range header
add feature enabling leo_manager to take over
Upgrade libs
add savannah_mq
Update redundant-manager's version
Modify output items
Upgrade libs
Implement function of rack-awareness replication (DONE)
Merge branch 'maint_0.14.1' of https://github.com/leo-project/leo_gateway into develop

Conflicts:
	src/leo_gateway.app.src