[add_sandbox_endpoints] Add Sandbox endpoint in enviromnent :test
[add_sandbox_endpoints] Improve specs description
ignore some env files
make tests compliant with RSpec 3
delegate config information to a threadsafe object
Merge pull request #19 from rodrigoddalmeida/threadsafety

Threadsafety para configurações da conta
Merge pull request #17 from paulopatto/add_sandbox_endpoints

Adição das urls do sandbox
Definindo environment sandbox
Merge