initial project
ServiceLayer::Locator

Service locator used to find services by a key that they have
been registered with.
Added vim swp and swo files to gitignore.
Added ServiceLayer::Dependent mixin to declare service dependencies
Added Service module

Including in a class registers that class as a service to be looked
up by name.
Add ServiceLayer#collect_services! to auto-register from Services ns

Any classes defined with name [Whatever]Service are auto registered
as services against their underscored class name.
Make all tests run from rake task.
Gemspec details