-Created DummyReading, in an attempt to generalize ReadingSources and
ReadingCircularBuffers;
-Created UnboundedOrientationFilterand respective test, that receives
OrientationReadings and eliminate discontinuities due to bounded values;
-Deleted extra StepReadingSource from StepAnalyser, because there was an
underlying one from Analyser;
-Finished PositioningAnalyser for the time being;
-Corrected a bug in PositioningAnalyser and AutoGaitModelerAnalyser,
where their respective runnables may have not been initialized and still
tried to be ran;
-Created OfflinePositioning test to the library running in positioning
mode;
-Assorted refactoring.