Expanding SoundWorkshop class

SoundWorkshop class now has its own Array for records. Records are
pushed into Array via -pushRecordsToArray method that receives
AVAudioPlayer objects and is called only when user wants to accept
recorded sound.

playReversedSoundInterval method has been added to SoundWorkshop class
in order to play reversed sound bits.
Main ViewController clearance

All methods and Array containing sounds was moved to SoundWorkshop
class as it describes all manipulation with sound objects.

playSoundFragment action was created for 5 buttons that are created
compile time in order to play 5 sounds bits of reversed sound.
Lines that was moved or deleted

This commit shows lines that have been moved from the project. Changes
that are not important for project functionality.