wip specs
Adding GithubService#get_pull_requests specs
Adding specs for GithubService#get_organizations
WIP Refactoring get_diff method
Adding specs for GithubService#get_diff method

Signed-off-by: Edmundo Perez <edmundo.perez@crowdint.com>
Finishing specs for GithubService

Signed-off-by: Edmundo Perez <edmundo.perez@crowdint.com>
Merge pull request #8 from crowdint/specs

Merged from PR Dashboard by efigarolam