Move pull_other_sdks functionality to the Makefile

README.md maintenance
Sync of tests from botocore
Regenerate classes with fix to ElasticBeanstalk
Better handling of Boolean values in rest of APIs
Update botocore to develop
Updated API definitions
Update tests from botocore
From Issue #3: Applied patch to get the right $type to new_with_coercions
Update SDK definitions
Add stuff to TODO
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Heavy refactoring of _to_params. Solves Issue #4

Simplified the "_to_params" model: each calling scheme is resposible for serializing
the objects to the calling spec parameters format.

Deleted the ToParams role, that is useless (there is no "one way" of serializing
to parameters.
Bug fix: new_with_coercions boolean parsing was always set to 0 because of string comparison
Create yaml files that describe the tests to be run
Add a cpanfile with the dependencies needed for the SDK
Merge pull request #6 from kidambisrinivas/master

Bug fix: new_with_coercions boolean parsing was always set to 0