Fix two more security vulnerabilities, remove http-server.

[fulv]

I have removed http-server because it does not seem to be used, and because of jfhbrook/node-ecstatic#259. (http-server depends on ecstatic, which contains a vulnerability, the resolution of which is likely going to be messy).

The remaining vulnerabilities are in:

• node-sass, and I am confident this will be resolved shortly
• jasmine-webpack-plugin, and I need to look into this a bit more. But the severity of these is medium or now.

[pilz]

Why are the tests suddenly so stable?

[fulv]

not so loud

[pilz]

lol