Update changelog

bump up minor version

Add debug documentation

upgrade API version to 2013-8-01

add browse_node_lookup and similarity_lookup methods
add /, get_elmeents & get_element methods on Amazon::Ecs::Response

update host name

Add support for Amazon Brazil

Update Readme to clarify on .configure and .options behaviours

Update changelog and version

Add Amazon Spain API host

* Add VERSION constant in Amazon::Ecs

* Update dependent gems version in Gemfile
* Add Gemfile as part of the gem content
* Update amazon-ecs.gemspec

Bump up patch version

Add search index info