Inconsistency of format for mention of terms in annotations

[mark-jensen]

@BrendaBraitling notes in #573 and @gregfowlerphd in #590 that the convention of capitalizing the labels of classes when they are mentioned in annotations, such as definitions (most commonly) or comments and elucidations, is inconsistently deployed across CCO. It has been raised before in numerous contexts.

This issue shall serve as starting point to resolve this problem before the next release. @neilotte @johnbeve @APCox @alanruttenberg

The ideal is an unambiguous way of formatting the reference to labels for classes or properties in annotations so that a script can be run across annotations during a build process so that any changes to an element label propagates across all annotations.

Important Note: an acceptable solution is to not use special formatting at all in the annotations if a solution cannot be reasonably implemented at this point.