ArduboyPlaytune v1.0.4

Fixed a timing problem that caused some played scores to stutter.

Thanks, @LenShustek (Len Shustek).

ArduboyPlaytune v1.0.3

• Replaced pinMode() and digitalWrite() calls with code that controls the pins more directly, as is done elsewhere.
• Added info in README.md for configuring a DevKit.

ArduboyPlaytune v1.0.2

• Fixed a bug in global mute handling.
• Improved comment formatting for Doxygen and added a Doxyfile config file.
• Changed documentation to describe use with the Arduboy2 library instead of the Arduboy library.
• Changed license text in source files from GPL to MIT. (This should have been done in version 1.0.1, when the license was changed, but was missed.)
• Other minor code refactoring.

ArduboyPlaytune v1.0.1

Formatted comments for Doxygen.

Changed license from GPL V3 to MIT.

ArduboyPlaytune v1.0.0

Merge pull request #6 from MLXXXp/master

Add support for output disable/enable (mute)