consider auto-updating clients when static content changes

[skariel]

current status:

refresh only when document file is modified

problem:

say you change the faviccon. should it refresh with all clients? or maybe just let user "modify" the document to do that?

[skariel]

with the new reloader feature to track any additional file this is almost done... it would be goo though if we could add a whole directory to track... so leaving this open for now