import/format tools?

[mark]

Is there a tool that will sort imports (e.g., as per the style 
guide), and that will also add the specific names used?

Also, is there a D source formatting tool (ideally with options 
to set a max line length and choice of braces style)?

Is there any runtime (or compiletime) cost to just listing 
imports at the start of a file without listing the specific 
functions?

Is there any advantage to doing imports inside functions, or to 
listing specific imports?