Editorial: Arrange contents consistently

[ben-allen]

Resolves the following aspects of #405:

Placed Prototype Object properties in the following order for all Intl Objects:

1. Intl.Foo.prototype.constructor
2. Intl.Foo.prototype.resolvedOptions ()
3. Intl.Foo.prototype [ %Symbol.toStringTag% ]
4. ...Foo-specific properties in alphabetic order...

Gathered all Abstract Operations associated with each Object into the Abstract Operations section for that Object. Previously Intl.DateTimeFormat, Intl.Locale, and Intl.NumberFormat had several Abstract Operations appear inside the constructor clauses of those Objects.