Major changes are:
* Add facilitators for organizing files (useful if you have more than dozens of files)
* Search files button
* Improve organization of cases (can open files assigned to the case)
* Add Settings Tab, so user can change settings (e.g. colors for coding) easily
* New function write.FileList() to import files by batch
* Improve pdelete(),list.deleted() and undelete(). New function of CleanProject()
* Add pop-up menus of right-click to makes it easier to use
* Codes and Coding cummary functions: CrossCode(), SummaryCoding()
* Fix bugs.

Features of 0.1.6 is frozen. More test is needed. If there is no big issues are found, I would like to submit it to CRAN. Thanks for your attention.