Removed core.js, no more used.
Fixed javascript coding style

After some review, it is not recommended to name variable
with a starting _ for global variable. Changed the code to
reflect that rule.
FindIt, disable flickable as it's not needed in our case.
clickgame, fixed a fish stall case on window resize

Thanks to Laurent Albert for his patience in reporting the bug.
instruments activity rework to have a better display

Imported accordion, bongo and organ from openclipart.org
Better display for colors and advanced colors.

The sizing is now correct on hight dpi screens.
leftright, better sizing of the hand on hdi dsplay.
Better sizing of the icon on hdpi display.
core, better sizing of the bar on hdpi display.
clickgame, better sizing of the fishes.
Removed permissions marker

The Qt tool chain adds a feature require on camera that we
don't need.
Update the ballcatch:

* Animation for the hands when the user presses shift on computer or taps on them on tablet/phones.
* Instructions text font size depends on the width on the screen (for little screen, default size was too big).
* typo for mac user.
* Shift keys not displayed on tablets.
Ballcatch, on fail ball goes in the right direction
ballcatch, simplified code

Replaced the upper level Item by the ball Image to make the code easier.
Using the scale property instead of changing the ball size.
Zipped the ball image.
ballcatch, some layout adaptation for tablets.

Replaced svg by svgz
Added author name in the help dialog box
Release 0.6
menu, adjusted layout to support longer title
Bar, improved text level
leftright, fixed level reset