Moved charset and http-equiv meta tags before title tag

See: http://blogs.msdn.com/b/ieinternals/archive/2011/07/18/optimal-html-head-ordering-to-avoid-parser-restarts-redownloads-and-improve-performance.aspx
clarified where jQuery can be included

Scripts can also be included before the closing `</body>` tag, not only in the header.
some proofreading edits

- reworded a sentence for clarity
- changed a semicolon to a colon (can't resist adding: http://theoatmeal.com/comics/semicolon)
Merge pull request #158 from jodytate/patch-1

Several edits to noty's gh-pages site