Add method level code compare

[CodesAway]

I have code I used for work that performs a code compare that uses the methods to compare code

• Find where changed method signature
• Handle / fix false positives of differences
• Show differences by method

Will need to figure out how to blend the file differences with the method related differences

The goal is to remove incorrect differences and improve matching of lines, by finding the corresponding method on each side for the code change.