Use option object for serveIndex[type]

[coolaj86]

PR Dependencies:

• expose fs.stat of root and files to all template functions #79 expose fs.stat
• Expose stat as w3 fileapi-like object #80 expose file meta as w3-file-api-ish

Description

Lots of the PRs involve adding options on how to change the view.

As part of moving towards having the ability to consistent output between the 3 templates (plain, json, and html), and the potential to have theme modules in the future, it seems to make sense to move towards a viewOptions object that can be passed to template functions.

serveIndex[mediaType[type]](req, res, directory, nodes, next, viewOptions)

instead of ever growing

serveIndex[mediaType[type]](req, res, directory, nodes, next, showUp, icons, path, view, template, stylesheet, twentyOneThing, twentyTwoThing, orangeRedThing, tourquiseBlueThing)