First pass at generating output documentation for each operation.
Moving the CLI-specific stuff over to awscli.  There is another PR over there corresponding to this one.
Fix module references.
Renaming clidocevents.py -> docevents.py since it is not really CLI-specific.
Merge branch 'add-output-docs' of git://github.com/garnaat/bcdoc into garnaat-add-output-docs