Merge pull request #1 from Zhonghui/experiment

add test clone
change version to float
Merge pull request #2 from Zhonghui/experiment

using (max version number + 1) as the new clone test's version number
remove repeat
do not delete every time and add timetag for history data
change source display to binary
Merge pull request #1 from cloudswenable/experiment

Experiment