Updating .gitignore
Checking whether the plot legend exists before styling its frame
Merge commit '2064272a4644974c11ecdaad7833f8f1079d2850'
Adding tag co-occurance notebook
Merge branch 'master' of github.com:sergeyk/vislab
Merge pull request #3 from matttrent/master

My changes to vislab (mostly tag co-occurances)