acu87542 Shortened a common comment.

This commit also identifies the set of API 1.5 classes and modules.
Note that the mc_ prefix is prevalent but not consistent.
acu87542 Shortened another comment.
    
This commit also identifies the set of API 0.1 classes.
acu87542 add comment for more API 0.1 classes
acu87542 add comments for API 1.0 classes
acu87542 minor tweak to comment

Actually all our APIs are stuck in beta anyways.
acu87542 added some info about instance facing API 1.0