Adding CPP/H implementation files, plus example sketch and update to
HTML file.

https://forum.pjrc.com/threads/32580-Audio-System-Design-Tool-Typo

Fixed: issue #56 - import and cut, copy & paste works fine, I added a routine which increments the numbers at the end of the names, IDs will be generated automaticcaly, if the ID already exists, and the appropriate name will be increased (e.g. "mixerRight" -> "mixerRight0", "input3" -> "input4" etc.)

Improvement: import ignores lines which start with an known type but ends not with an ";"
Tidy up: deleted the "resources" folder, all static data is in the index.html file
Prepared: Looking for a solution to semi-automatic arrange imported nodes without coordinates