Add description for sub-commands, re-wrap lines
Add explicit "ignore" mapping
And now also fail with an appropriate error message...

re: Fail on unknown options in input files
Allow transformations when appending to a key
Let _translate take an initial/default mapping as argument
Add create-role command

This will create and IAM role, an instance-profile suitable to be used
in the 'role' parameter in instance definitions, and associate specified
policies with the role.

The command will synchronize an existing role, instance profile and/or
associated policies to the definition provided, if they already exist.
[AutoScaling] Add support for scheduled scaling actions

This is going around boto's auto-scaling API, as support for the
'recurrence' parameter is quite recent and not available in the version
installed on my laptop.