Finance Guide Improved
Reference Links changed
Music Keyboard Guide Improved
Changed it, so that it is better understood by end users
Added How to use section
Turtle Blocks 3D Guide improved
Added one phrase and some line spacing
Chart Help Guide Added
Distance Help Guide Added
Get Books Help Guide Added
Labyrinth Help Guide Added
Star Chart Help Guide Added
Story Help Guide Added
Index Fixed
Added all the activities under appropriate section
(In lexicographic order)
Update helplink.json with the new activities added
Clean musickeyboard page