Issue title: Tutorials
 Issue body: http://hms-dbmi.github.io/scde/pagoda.html

l1cols is missing for some reason

`cell.clustering = hc, box = TRUE, labCol = NA, margins = c(0.5, 20), col.cols = rbind(l1cols))` is correct

`app <- make.pagoda.app(tamr2, tam, varinfo, go.env, pwpca, clpca, col.cols = col.cols, cell.clustering = hc, title = "NPCs")`
should be
`app <- make.pagoda.app(tamr2, tam, varinfo, go.env, pwpca, clpca, col.cols = rbind(l1cols), cell.clustering = hc, title = "NPCs")`

 Comments: 
 Comment 0: Fixed with commit 7f40039b29f5819256c218ba3fe52844474458da
{'source': 'GithubIssues', 'repo_name_with_owner': 'hms-dbmi/scde', 'issue_id': 114717429, 'repo_stars': 161.0}