remove unused script link
add common head elements

- identify language: `html@lang`
- identify character encoding: `meta@charset`
- add page title
remove unused temporary variables

When you find yourself naming variables like this:
_question1, question2, question3, ..._
It indicates you need an array (which you have as well).

This change just crushes the quiz data down into one variable.
It's worth getting used to this format, it's very similar to JSON.
(JSON is strict about syntax, e.g. must use double quotes on everything).
Merge pull request #1 from bboyle/review

review part 1