[docs] Update examples to explicitly require dojo.parser

[Kenneth G. Franqueiro]

This is kind of related to #12907 - which I wholeheartedly agree is NOT a bug nor a regression.

One good point brought up by someone in the IRC channel, however, is that we may need to go through examples in the docs and ensure that examples needing parser actually require it. (It's possible some of these might break, if they were relying on transitive loading of dojo.parser but only require widgets that don't use widgetsInTemplate behavior.)

Also I'll point out that since we've already seen a few people confused by this, we could probably use a release note to remind people to require parser themselves - even though that's how it always was, it was a "best practice" that previously ended up ignorable in more cases than it will be now.

[Colin Snover]

1.8 has been tagged; moving all outstanding tickets to next major release milestone.

[dylan]

Given that no one has shown interest in creating a patch in the past 4+ years, I'm closing this as patchwelcome.