Revert "Made AudipProcessorParameter methods, dealing with value scaled-raw conversion, public."

This reverts commit eaabce32a6a47c60bed3c8f585fce4a9270fe507.
Revert "Fixed AudioProcessor class methods implementation to match declaration. Made managed-parameters method use setParameterValue method as the focal point for all other parameters alteration methods."

This reverts commit 6726d160588297270b498dca401e68022164aa72.
Revert "Added (SR specific) handling of raw (non-scaled) parameter values by the Audio Processor Parameter abstract class. Implemented raw parameter values handling by the Audio Processor instances, based on the newly added Audio Processor Parameter methods."

This reverts commit bd35a3fc306ff7bbaac0f7a3d266c5a72299cddf.
Fixes for git merge bda716fe558788181f2ff6f140e1956289bab4c1

With that merge the JUCE example plugin did not compile and also it seemed to include a small unrelated change.