MKL nb
minor fixes
add fixes
multiclass example
cleanup
one-class example
update the base class
add the header file
add the basic cpp file
add the set_distribution method
add the precompute  method
add the get_variational_expection  method
add the get_variational_first_derivative  method
complete the get_variational_first_derivative  method
minor fix
added the unit test
update multiclass example
change based on mentor's suggestion
Merge pull request #2108 from karlnapf/develop

Revert "Merge pull request #2101 from ahcorde/sudoku_ipythonNotebook"
Improve build system: Making installed examples executable.