New Mouse !!

• Initial turtle blocks svg is replaced with an awesome mouse teacher svg made by Chie 🙂 .
• Help menu updated!
• Chunk transposition added in assemble workspace, Now transposition goes up or down and does not restart in the same octave.
• Made play matrix block compatible with repeat and forever blocks.
• Did matrix enhancements and made the cells of the matrix play their respective sounds when clicked.
• Made ‘Play’ and ‘Stop’ button on top right corner. Play button now plays the music inside start block and Stop button stops the same.
• Fixed minor bugs and did some code refactoring.