updates
Merge branch 'master' of https://github.com/destenson/AlgebraCpp

Conflicts:
	Algebra/Math/Algebra.Internals/Expression.MakeExpressions.cs
	Algebra/Math/Algebra.Internals/Number.cs
	Algebra/Math/ArbitraryLimits.cs
	Algebra/Math/BigDecimal.cs
	Algebra/Math/BigDouble.cs