Fixed a deprecation warning from the integration tests.
Changed header sizes for readability.
Fixed a path issue in how the ServiceBuilder loads API JSON files.

Fixes #91
Not prefixing API file paths when they are given as absolute paths.

See #91
Fixed a few more deprecation warnings in the integration tests for S3.
Updated the rake task that builds the table of supported services in the README.
Tag release v2.0.0.rc14

References:
  #90, #91
Forcing UTF-8 encoding when loading API files.

See #92
Spec fix.
Marking internal interfaces as @api private.
Removed the Seahorse::VERSION constant.
Marked a few more internal interfaces as @api private.
Structure#to_h no longer expands StringIO objects.

Also made the default behavior of `#to_h` available as
`#orig_to_h`.
Added some docs to Aws::Structure.
Added unit tests for Aws::EmptyStructure.
Added unit tests for the null paging provider.
Merge branch 'master' into resources