Installs OCMock's pod
Fixes 'registerProvider:´ method:

* Saves provider using his identifier as key
* Deprecates 'registerProvider:params:'
Upgrades CHANGELOG
Forces cocoapods' version
Fixes travis' configuration using workspace intead of project
Changes pods upgrade stage and fixes warning abuout encoding
Merge pull request #4 from vbergae/fix_service_provider

Fix service provider