UPD adding plugin manager to Container
UPD adding a test for Service\Builder added to Container
UPD adding code to add Service\Builder to Container
ADD test helper file to return a collection of callbacks
UPD adding test to ensure that callbacks from config are added
ADD test helper file to test plugins registered during sprayfire bootstrap
UPD adding test for plugins registered appropriately
UPD adding code to add callbacks and register plugins during Bootstrap
UPD adding test for path generator added to service