Fix keras argument spelling error in densenet.py (#74)
Fix keras argument spelling error in densenet.py (#74)

It looks like in 1d57dd3c63eab5b181c412436c9fcffc748cc72e a spelling error ("kenel" not "kernal") was introduced into densenet.py that causes an argument error from keras when trying to use the network. This pull request corrects that.
stygstra/keras-contrib,keras-team/keras-contrib,keras-team/keras-contrib,keras-team/keras-contrib,farizrahman4u/keras-contrib