Almost done with Fraction here. Fraction() operates with int inputs only, due to the mathematical limitations of the fast algorithm, so of() methods only need to handle int inputs.
But what about BigFraction()? Right now the of() methods handle BigIngeters only. Do we want to expand this so a BigFraction of() method can handle any combination of BigInteger, long, and int? That would be quite a few constructors but that's life with hard typing. Or should we document that the user should wrap arguments to a BigFraction of() call in the BigInteger class? I suppose I lean toward the latter. Once I resolve this issue, I think I'll be able to run a style check and submit the code for anyone interested to review.
