add sort option

[Daley]

app.use('/', serveIndex("dir", {'icons': true,sort:serveIndex.fileSortWithMTime}));

[dougwilson]

Hi @Daley, thanks for your pull request! There is another one before your PR, can you explain the differences between that one and this one?

[dougwilson]

Please undo this version bump.

[mrv777]

#41 seems to sort by a function that is passed. This one just adds the sort by modified date. This one is simpler and the other is more versatile.
I prefer this one for simplicity and can code other sort functions as suggested by the author instead of making the user provide it.

It's up to you, but I think this function is very much needed

[baihe]

Will this be merged ?
Thanks

[roy7]

It'd be awesome if you could merge in one of the two sort solutions. :)

[dougwilson]

I at least need the PR updated with the change request I made. Since I requested the change a year ago and the PR still hasn't been updated, I'm just going to close it. Someone can always open a new PR if they are interested in picking it up and making any changes from review feedback.

[roy7]

Ah ok, bummer @mrv777 didn't make that correction for you.

Since I only needed sorting myself for a specific one-off project, I just manually changed fileSort to the code he used.