Merge pull request #1 from auxbuss/master

update gem dependencies + added authentication test task
Better activesupport gem requirement
Gemspec update, rakefile update
Major refactoring
Specs refactoring, configuration
Readme update
Global configuration, specs
Try to use global config
Reset global configuration options
More readme
Added tracis ci build status image
Moved all api methods to separate modules
Version bump: 0.2.0
Add methods for getting books from user's shelves.
Method for making OAuth API requests and support 
getting user id of user who authorized OAuth.
Fix spec syntax to run under 1.8.7.
Merge pull request #2 from thegreatape/master

Support for getting books from a particular shelf / support for OAuth and getting the id of the auth'd user.
Version bump
update license for 2013
fix typo