Unit test for log_det added. log_det updated.
Unit test for log_det added. log_det updated.

besser82/shogun,lisitsyn/shogun,besser82/shogun,Saurabh7/shogun,shogun-toolbox/shogun,sorig/shogun,sorig/shogun,lambday/shogun,besser82/shogun,lambday/shogun,karlnapf/shogun,lisitsyn/shogun,karlnapf/shogun,sorig/shogun,geektoni/shogun,lisitsyn/shogun,shogun-toolbox/shogun,lambday/shogun,lambday/shogun,Saurabh7/shogun,geektoni/shogun,sorig/shogun,karlnapf/shogun,lambday/shogun,shogun-toolbox/shogun,lambday/shogun,Saurabh7/shogun,geektoni/shogun,geektoni/shogun,lisitsyn/shogun,Saurabh7/shogun,geektoni/shogun,Saurabh7/shogun,Saurabh7/shogun,besser82/shogun,sorig/shogun,besser82/shogun,Saurabh7/shogun,geektoni/shogun,besser82/shogun,lisitsyn/shogun,shogun-toolbox/shogun,shogun-toolbox/shogun,sorig/shogun,lisitsyn/shogun,shogun-toolbox/shogun,Saurabh7/shogun,karlnapf/shogun,karlnapf/shogun,karlnapf/shogun,Saurabh7/shogun