Remove native dependencies from build steps

[max-mapper]

I tried to build the site with node v4 today and it failed because jsdom failed (actually the sub-dependency contextify failed), and also the posix module failed to build. Both of these are native modules.

It would be nice to get rid of native modules and replace them with pure JS ones, just to make this repo require less maintenance when new node versions come out.

• replace jsdom with something else (it's used in scripts/build-html.js)
• replace posix with something else (it's used in util/cmdwatcher.js)

[mikeal]

replace jsdom

Cheerio uses htmlparser2 and dom-serializer which are not native.

[kohei-takata]

Hi,

I tried updating version of jsdom and posix and it seems to work correctly.
I use node v4.2.2 and npm v3.3.12.
refs kohei-takata@f61154e

If there are some opinion that we should not use native modules, I will try another solution.

Thanks

[max-mapper]

@kohei-takata this is good news. I think we should leave this issue open for long term, but you should merge in your branch to at least fix the current issue

[kohei-takata]

@maxogden
OK. I will make a Pull Request!

[gutierri]

posix triggers errors in Windows. It does not solve #446