[TASK] Get rid of FluxService->getChildContentElementUids
[TASK] Get rid of FluxService->detectParentElementAreaFromUrl
[TASK] Get rid of FluxService->detectParentUidFromUrl
[TASK] Move parent element UID detection to ContentConfigurationProvider
[TASK] Move FluxService->getContentAreasDefinedInContentElement to AreaListItemsProcessor

- function was only being used there anyway and was not appropriate as public method on an API-level service.
[TASK] Remove unused methods, leftover from the FED days
[TASK] Move getChildContent to Content / Get ViewHelper
[TASK] Move controller class resolve methods to AbstractFluxController
Merge pull request #101 from NamelessCoder/contentmethodrefactor

[TASK] Move and remove content methods from FluxService to Provider and UserFunction