add some unit-tests for likelihood models
replace eigen3 exp() call with shogun exp() call
Merge pull request #1325 from votjakovr/feature/gp_refactoring

Add some unit-tests for likelihood models
add get_copy function to lib/memory to be used from typemaps for clones
Merge remote-tracking branch 'upstream/develop' into develop
fixed Jedi, added Jedi unit test and some cleanup to all the ajd headers