added print function, packages folder to .gitignore

NeuronNetwork/.gitignore

NeuronNetwork/NeuronNetwork/Network.cpp

NeuronNetwork/packages/Eigen.3.3.3/.signature.p7s

NeuronNetwork/packages/Eigen.3.3.3/Eigen.3.3.3.nupkg

...Network/packages/Eigen.3.3.3/build/configurations.autopkg

...onNetwork/packages/Eigen.3.3.3/build/native/Eigen.targets

...ackages/Eigen.3.3.3/build/native/default-propertiesui.xml

...ges/Eigen.3.3.3/build/native/include/Eigen/CMakeLists.txt

.../packages/Eigen.3.3.3/build/native/include/Eigen/Cholesky

...ges/Eigen.3.3.3/build/native/include/Eigen/CholmodSupport

...work/packages/Eigen.3.3.3/build/native/include/Eigen/Core

...ork/packages/Eigen.3.3.3/build/native/include/Eigen/Dense

...ork/packages/Eigen.3.3.3/build/native/include/Eigen/Eigen

...ckages/Eigen.3.3.3/build/native/include/Eigen/Eigenvalues

.../packages/Eigen.3.3.3/build/native/include/Eigen/Geometry

...ckages/Eigen.3.3.3/build/native/include/Eigen/Householder

...n.3.3.3/build/native/include/Eigen/IterativeLinearSolvers

...rk/packages/Eigen.3.3.3/build/native/include/Eigen/Jacobi

...etwork/packages/Eigen.3.3.3/build/native/include/Eigen/LU

...kages/Eigen.3.3.3/build/native/include/Eigen/MetisSupport