Mouse interface completed for both octaves | added documentation at most of the places inside the code

added one level which extends the piano to two octets, added an icon which shows key labels on clicking

Added new Activity Piano - to learn and play piano. Now you can play one octet by pressing the keys a-k in the computer keyboard

edited Makefile.am at src/ , edited configure.ac to add rhymes, added a new menu icon for rhymes, edited the heading for rhymes

Added Makefile.am for each level, and used the focus API on melody icon, corrected the code for playing the melody

Fetched data from config file using config parser, but newline is not working,moved all resources to resources/rhymes

Improved rhyme-activity, added 2 levels added an audio button which plays the rhyme (file available only for twinkle twinkle now)