*Todo

Merge *rqda from different coders

inter-coder reliability (Can do re-coding which is store in "coding2". only mark, unmark and edit file can take care of the second coidng now.)

support Image file.

pdelete function for journal table.

dbBeginTransaction(RQDA:::.rqda$qdacon)
....
dbRollback(RQDA:::.rqda$qdacon) or dbCommit(RQDA:::.rqda$qdacon)

collect all code memo into a widget with information like date etc.
