Fixed response headers in dry_run
Added configuration for Travis CI
Fixed cache name test
Moved development dependences to gemspec
Merge pull request #13 from mbacovsky/dry_run_headers

Fixed response headers in dry_run
fixes #6820 - apipie-bindings should enforce required params, BZ 1116803
adding function on actions and params to build trees of their params
adding deep recursive validation of params
removing reliance on gettext for internationalization
refs #6820 - refactoring Param#tree and Action#api_params_tree
refs #6820 - adding deep diffing of required_params vs passed params