Legacy MATLAB and Simulink Support for Arduino

See release notes for this release on GitHub: https://github.com/giampy1969/legacy-matlab-and-simulink-support-for-arduino/releases/tag/v1.15.0.0

Added spaces to enhance readability
Updated description indicating new options for projects based on R2014a or higher.
Updated name and description.
Removed reference and link to the old webinar.
Added one space in the description.
Trying bigger picture
Uploaded picture

Improved handling of mega-related pins from Simulink ADIO blocks. Also added instruction (in the readme.txt file) on how to use the official stepper.h Arduino library with this package.

Reorganized sketch handling and examples, improved docs and added support for Adafruit Motor Shield V2.

Encoder debouncing function added

1) Simulink library now handles pre-existing Arduino objects
2) MEGA board fully supported
3) Servo support greatly improved
4) Full encoder support
5) Example function for customization
6) Assorted minor improvements

Minor fixes and improvements, mainly for the MEGA and ChipKIT32 boards.

Minor fixes to demo mode for servo handling

* Minor changes to readme, Simulink example models, and .pde files
* Added images for Simulink model preview