GCAudio, now the play and append function return false if file not found

This makes it easier to display or hide a repeat button for example.
findit, no more display the repeat button if audio file is not found
mining, minor code reformatting
mining, add a background under the instructions
canal_lock, add a water audio effect on lock water level change
canal_lock, add audio effect on wrong lock or door click
followline, add audio effects
move water.wav in the core directory as we use it several times
scalesboard, add an audio effect on scale move
clockgame, layout change, move the instruction at the top with a background
colorchooser, add an audio effect on color change
braille_alphabets, add audio effect and color change effect
football, add audio effects
enumarate, add a sound effect
DialogHelp, add the name of the activity

It was starting to bee too hard to find which activity we are running.
algebra_by, add a sound effect
menu, pass the audio items up front when the activity is created

The audio items was passed after the activity was created which was
making it hard to get them when referenced directly in created sub items.

Now we pass them to the loader so that activities are created with these
properties set instead of being set after.
magic-hat-minus, add an audio effect
leftright, minor layout improvements
menu, minor remove a log message