Update EJS, Stylus, Sass, and LESS

[kennethormandy]

For #24, adds a

• new, minor version of EJS
• new, major version of Stylus adds the first version of {block}, which gives Stylus’ something like Sass’ @contents.
• new, major version of Stylus real support for {block}, lots of small fixes, support for @require, apparently?
• new, major version of LESS adds interpolation, 20%–40% speedup (what?!), shadowdom, better errors…wow.
• new, major version of Node-sass, changed the test for the included libsass update, adds initial sourcemap support

There’s a new version of Marked out, too, but it shouldn’t be updated until markedjs/marked#276 is closed.

[kennethormandy]

Updated Stylus again, now at 0.41.3 Waiting on using the latest Marked until markedjs/marked#326 is closed.

Updating Jade as a separate PR, because there was an API change.

[fluidsonic]

The really old version of node-sass doesn't even install for me on Windows when using Node 0.11. Upgrading to latest node-sass fixed that.

[kennethormandy]

As far as I know, Node-sass still doesn’t work on Node 0.11. I don’t think we’re saying that Harp works on 0.11.x yet. But that’s definitely something I’ll keep an eye on, thanks!

[kennethormandy]

Actually, it looks like there’s a bug on the latest version with Windows, so we should stay at 0.7.0 until sass/node-sass#231 is closed.

[kennethormandy]

All tests are passing for this on Windows 8, too. 🌴