[Pull Requests] Hide gamma, beta, var, mean in graph visualization

[Lyken17]

Hi all

After ResNet, Batch Normalization becomes quite popular and is widely used recently. However, for visualization, I found parameters bn_gamma, bn_beta, bn_var, bn_mean occupy a lot of space while providing little information. plot_complex.pdf And it also made visualization of some large networks totally unreadable plot_complex_resnet.pdf

During my experiments, BN is always treated as a normal layer (like a convolution). Designers usually does not focus on beta/gamma/mean/var, especially on visualization. I suggest to hide these parameters during visualization.

Examples after modification
plot_clean.pdf
plot_clean_resnet.pdf

I have submitted a pull request for this issue.

[piiswrong]

Thanks for PR.