frank : modify workfiles -> noname buffer
frank : refactoring split files
frank : modify directory structure and contained in autoload directory
frank : refactoring remove several functions
frank : bugfix window switcher
frank : modify close functions
frank : modify action functions changed to autoloaded function
frank : modify launcher
frank : create print with marker
frank : modify syntax for fold mark
frank : create Folded syntax
frank : create fold open/close command
frank : create fold prev/next command
frank : create fold openall/closeall command