std.bitmanip improvements

[Era Scarecrow]

On Friday, 28 December 2012 at 01:21:01 UTC, Marco Nembrini wrote:
> If so would you mind me trying to do that in your place? It 
> seems worth spending some time on to get all those improvements 
> in.

  Well since this is going I've resumed some work on it, nice to 
see the opBinary works along with the opDollar. I seem to have 
problems figuring out where to tell my github source to get the 
current beta so I can just work/update from that. All of it is 
quite confusing to me.