Outcome and documentation ### General - Added the description of each projection in its documentation (#45, !37) - Added information on how to use the project (#45, !37) ### State - Removed the 'reporter' progress of the slice builder, avoiding the context creation on each call (3bad6da0, !36) - Renamed Slice to Outcome (#49, !38) - Created ProgressiveOutcome, which combines an Outcome with a Progression (#47, #49, !36, !38) ### Cache - Less logging for ExpirationCache (#43, !39) ### Backbone - Added function Ref.now() as a convenience for Ref.request().firstValue() (b7e824bb, !36) ### Spine - Clearer failure logging for the Ktor backend (#51, !40)