Sync Database

Add database Sync support so multiple copies of the database can exist on flash drives and sync once plugged into a single computer running the application.

Need a way to keep track of edits since last sync along with date each change was made.

For conflicts where a record has been changed in the master database one or more copies give master database precedence if that setting is selected otherwise allow the user to choose which change set to keep or allow user to merge the changesets.
After #3 , #9