fixed a problem with convolutional neural nets
added convolutional networks to the neural nets notebook
added graphcuts python examples
fixed a problem with convolutional neural nets
added a notebook for RBMs and DBNs
added convolutional autoencoders
Merge pull request #2441 from khalednasr/conv_notebook

Added convolutional neural networks to the neural nets notebook
Fix spacing in PCA.cpp and add assertation for function parameter
ANPR version check for OpenCV
Merge pull request #2465 from kislayabhi/anpr_version_error

ANPR version check for OpenCV
fixed issue  #2464
Merge pull request #2466 from khalednasr/master

fixed issue  #2464
Merge pull request #2440 from khalednasr/rbm_dbn_notebook

added a notebook for RBMs and DBNs
Modified MultilabelCLRModel and HieararchicalModel to correct implementation of init_primal_opt()
Merge pull request #2468 from abinashpanda/develop

Modified MultilabelCLRModel and HieararchicalModel
Merge pull request #2438 from Jiaolong/graphcut_python_example

added graphcuts python examples