Implement Nakagami distribution as an extension.

[Paolo Carlini]

On 09/18/2012 03:23 AM, Ed Smith-Rowland wrote:
> Here is another tweak for the Nakagami distribution.
>
> operator() is a one liner without a local  variable.
>
> The template friend is fixed and the relevant test has been added. 
> Changed dates.
>
If this version is tested (please remember to say where and how) it's 
Ok. Thanks!

Paolo.

PS: lately I normally use -std=c++11 for new testcases: IMHO at this 
point -std=c++0x should be considered a legacy switch.