Scripting instructions page

[pmeenan]

Sorry, it used to be on a separate page but that didn't make much sense. The vast majority of the commands work, just the few that are called out that deal with things like attachments and external files do not.

Before WebPagetest, pagetest was a browser plugin that could be automated on it's own and it supported more complicated scripting that measured multiple steps independently and let you upload/download files and load variables from external files. Since there's only 1 user that I'm aware of that uses it in that mode I'll probably just remove those commands from the docs completely.