Merge bools

Fixes #226.

Docs now look like how they use to:

```
       --disable-api-termination   |   --no-disable-api-termination  (boolean)
       Specifies whether the instance can be terminated using  the  APIs.  You
       must  modify  this  attribute  before  you  can  terminate any "locked"
       instances from the APIs.
```

This depends on the corresponding bcdoc changes here: https://github.com/boto/bcdoc/pull/17

If you want to test this locally you'll need to pull in the above change.  Note that this will also cause the travis ci builds to fail until https://github.com/boto/bcdoc/pull/17 is merged.