Fix splitby bug; tune shared/backup device shortcut handling;
modify alterTableFileSplitedBy to solve subsplitedby data lost
modify show index to add show index properties
Merge remote-tracking branch 'origin/zhaoyang' into zhuqihan
Merge remote-tracking branch 'origin/zhuqihan' into v0.2, OK
alter table filesplit tested ok,add msgs for grant and revoke privileges
a framework for msg consumer
add file removal and remove zqh print.
Fix asyncconsumer and file split key change bug.
modify how to determine whether filesplit key changed
Merge remote-tracking branch 'origin/v0.2' into zhaoyang