The API translator now applies required to path params.

If a request param appears in the HTTP request path,
it is now marked as requried.
Regenerated APIs to add required to path params.
Removed a stray character from a doc template.
Generated API usage examples now generate hashes with 1.9 syntax.
Added a plugin that sets the glacier api version headers.
Fixed the failing tests for Glacier.
Added the glaicer specs and updated the API configs to remove the json simple plugin.