Allow for jasmine.yml to be in 'config/' instead of 'spec/javascripts/support/'

While I understand the decision a lot of people are going with MiniTest for Rails 4 projects instead of RSpec. It seems like a good idea to keep the choice test location independent of the configuration file itself.
Merge pull request #51 from chrisnicola/patch-1

Allow for jasmine.yml to be in 'config/' instead of 'spec/javascripts/support/'