Pymusic-term

- Created and added progress bar widget to show time elapsed in a song
- Added ability to change volume with the key <kbd>v</kbd>
- Added the feature to block <kbd>n</kbd> and <kbd>p</kbd> keys when a song is repeating

- Fixed segmentations errors when a song is changing
- Fixed errors that happened in changing song

Features:
- Enable to repeat actual song playing
- Delete songs from queue songs
Errors fixed:
- When the song playing is delete from queue and then it is select another one with the same index, the player does not reproduce the selected one
- When the song playing is delete from queue and the player automatically changes to the next one with same index, it does not reproduce it