added QDiag and Jedi AJD methods
added JADiagOrth unit test
fixed Jedi, added Jedi unit test and some cleanup to all the ajd headers
silence some warnings
coding style fixes in AJD
ajd double -> float64_t
coding style changes in ajd unit tests
ajd updated to cpp style loops
add very basic python graphical example of GP binary classification
Merge pull request #1340 from votjakovr/feature/gp_binary_classification

Added very basic python graphical example of GP binary classification
Merge pull request #1326 from pickle27/develop

added QDiag and Jedi AJD methods
Merge pull request #1336 from votjakovr/develop

Fix various errors and warnings detected by clang.
-added unbiased estimator for marginal likelihood.
-new class for probability distributions and a Gaussian for sampling and log-pdf (numerically stable)
-log-sum-exp and log-mean-exp in CMath
-CLikelihood model now is able to evaluate many likelihoods at once
updated news