Added JSON support

Included jsoncpp and made it run.
Added JSON support to MATLAB

JSON configuration files are now supported as option parameter.
latest built for Mac

Enabled JSON support for Mac and removed some compiling errors that
occurred only on Mac.

Fixes #1.
Added basic Gaussian mixture model
GMM for MATLAB
Performance increase

Changed scale and normlisation loops.
Added GMM test.
Added mu and sigma to GMM change measure
HMM documentation error removed
Added NaN-Support and created GMM_cpp.m
Newest built for Mac