Made changes in classifier`s files containing math.h include and replaced them with shogun/mathematics/Math.h as told in issue 1328.

There are other files too containing math.h which need to be replaced and on my pc i have done and compiled it already and its working fine. As this is the first time i am making a pull request i thought of committing only small changes. I will make all required changes in my next pull request.
in the first commit things were right in classifier but in second commit
smthn went wrong i am fixing it.

On Wed, Dec 10, 2014 at 6:07 PM, Heiko Strathmann <notifications@github.com>
wrote:

> In src/shogun/kernel/Kernel.cpp
> <https://github.com/shogun-toolbox/shogun/pull/2629#discussion-diff-21600376>
> :
>
> > @@ -992,9 +992,9 @@ template <class T> struct K_THREAD_PARAM
> >  	/** end (unit row) */
> >  	int32_t end;
> >  	/** start (unit number of elements) */
> > -	int64_t total_start;
> > +	int32_t total_start;
>
> ehm, what is going on here?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/shogun-toolbox/shogun/pull/2629/files#r21600376>.
>