Methodnize response hash key value
Merge pull request #2 from YasuOza/master

Add .gitignore
Merge pull request #1 from YasuOza/response_methodnize

Methodnize response hash key value
Reform file structure
Merge pull request #3 from YasuOza/feature/reform

More library looks file structure.
support other http methods except get
Refactor Response#new and Response#methodnize

Change Response#methodnize from instance method to class method.
Because we do not need change response's hash to methodnized object
again.
If there is such a necessity, let's extract methodnize to into some
module.
Merge branch 'refactor_response_methodnize'