Development v1.1.9 - library optimization and example program

[SV-Zanshin]

Description

Changed the library code to adhere closer to c++ standards and also optimized for size. Added a new example program for regression tests.

Fixes # (issue)

54 - Optimize library code

55 - Regression test example program

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] This change requires a documentation update

How Has This Been Tested?

The regression test sketch attempts to detect, in software, whether the library is functioning as documented

Test Configuration:

• Arduino version: 1.8.13
• Arduino Hardware: Uno, Micro
• SDK: Visual Studio with Visual Micro
• Development system: Windows

Checklist:

• [x] The changes made link back to an existing issue number
• [x] I have performed a self-review of my own code
• [x] My code follows the style guidelines of this project
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] The code adheres to the Google Style Guide
• [x] The code follows the existing program documentation style using doxygen
• [x] I have made corresponding changes to the documentation / Wiki Page(s)
• [x] My changes generate no new warnings
• [x] The automated TRAVIS-CI run has a status of "passed"
• [x] I have checked potential areas where regression errors could occur and have found no issues
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes