cleanup commented code
static String getPanelDir
minor code style
struct FileStruct
refactoring: Read --> FRead
refactoring: Write --> FWrite
refactoring: Open --> FOpen
refactoring: Delete --> FDelete
refactoring: Close --> FClose
refactoring: use :: to indicate global system functions
refactoring: MoveFile --> FMoveFile
refactoring: FMoveFile
version info: update