The Methane Number calculations could be more accurate

[gchoquet]

The Methane Number (MN) calculations use the H/C method which are relatively easy but not very accurate, especially for gases that contain CO or H2. I've done some research in this area and have a paper I can share if desired. From my research, I've developed a more accurate method for MN calculations for a broader range of natural gases. I've posted source code which is available here: https://github.com/gchoquet/EngineControlSoftware/