* creates a GetAllSprintsOptions structure
* adds a new GetAllSprintsWithOptions method to accept an int boardID and new options structure
* adds filtering functionality to GetAllSprintsWithOptions method
* adds SprintsList type for handling pagination results data from GetAllSprints request
* updates tests
Added TransitionService with 2 methods:
* GetList for retrieving possible transitions for an issue
* Create for creating transition and changing issue status in the
process