fix sort reverse when no sort key is given from cmd line
added message when bookmark add fails
create a backup file only if opening or adding
simplified fail on bookmark loading error
complain not only in a tty
make dialect importable
don't set process name
no more Bookmark
Merge branch 'no_more_bookmark' into develop
some restructurization
no more csv - used json instead
make main() less complex
lock/unlock bookmark file
add ID's to bookmarks
Added ignore-case search option; some old, useless code removed
changes to all operation functions
rename "selection" to "results", suppress subprocess output
Allow specification of initial visit_count when adding a new bookmark
searching/filtering/sorting functionality moved from BookmarkManager to View
version bump