Merge pull request #8 from gonzalo-bulnes/master

Fix configuration initializer
Switch back to expect syntaxt and further test TBK::Config module
Adding project to travis-ci
Fix ruby 1.8.7 hash syntax problem
Another Ruby 1.8.7 hash syntax problem
Exclude documentation related gems from ci
Bump version.

[ci skip]
Fix commerce creation
Fix commerce creation and add specs
Bump version to 0.9.2

[ci skip]
Add example project
Exclude example folder from gemspec