'str' in config.yaml should be renamed to 'string'

Excerpts from Gustavo Niemeyer's message of Tue Aug 30 21:30:26 UTC 2011:
> Public bug reported:
>
> There's no value in saving the 3 chars when we have e.g. 'float'
> already in the same context, and 'string' is actually readable while
> 'str' is not.

Will you be keeping str for backward compatibility?

There are 25 official principia formulas.. not sure how many will need
to be updated for this change.

Yeah, the branch linked adds a warning on 'str' so we're reminded to update it, but
it continues to work fine otherwise.

Excerpts from Gustavo Niemeyer's message of Tue Aug 30 23:49:38 UTC 2011:
> Yeah, the branch linked adds a warning on 'str' so we're reminded to update it, but
> it continues to work fine otherwise.
>

Awesome. I've opened a task against principia to check all config.yaml's
once this is released in oneiric. If by chance it isn't, we'll have to
wait until "P" to start using 'string'.

It's in trunk already, so should definitely go into Oneiric.

Minor clarification: it shouldn't go into Oneiric because it's in trunk, it should go in because we want to release formulas with "string", and this would not be comptible with the version of Ensemble in Oneiric if we don't release it ahead of time.

The version in oneiric supports 'string' now, so marking this as Triaged and importance High, this needs to be done for all charms.

All charms ahve been updated.