Move sections into files.

[BigBlueHat]

• Move helper functions into helpers.js.
• Extract sections into separate files.
• Rename files to preserve order.

  Naming of test files begins with the spec section number, however, later sections such as 4.10 become 410 (instead of 4-10) to avoid lexical ordering issues which cause later sections to show up earlier in the list.

[BigBlueHat]

was not expecting that big a deviation from convention here, but if it works I think we can do it here.

Yeah. Sorry. I felt mapping to section numbers (as much as I could) was also beneficial.