Proposal for a standard Decimal type in alpha

[Jack Stouffer]

On Thursday, 21 December 2017 at 13:59:28 UTC, Jack Stouffer 
wrote:
> ...

Updated version out:

* Added unary +,-,++,--
* Added casting to bool and floating point types
* Added static ctors for infinite and nan for floating point type 
compatibility
* Added abs, isNaN, isInfinite
* Added support to opBinary for mixing different precision levels 
on each side of the operation