combine remove empty, rm duplicate, and gen bundle number @yao

[cxcxxin]

this code may be reused for processing all transrec and review data

[amyge]

jiazhen helps me with the file naming system

[cxcxxin]

@geyao0619 so the code does not work for xlsx input and in general we sould always avoid reading and writing xlsx; try if it works for txt input

[cxcxxin]

@suyanglu check on Friday

[suyanglu]

checked