added python2.7-dev and graphviz to build-dep
added python2.7-dev and graphviz to build-dep

zarquon42b/statismo,kaspermarstal/statismo,clangguth/statismo,livia-b/statismo,clangguth/statismo,zarquon42b/statismo,statismo/statismo,livia-b/statismo,kaspermarstal/statismo,zarquon42b/statismo,statismo/statismo,livia-b/statismo,zarquon42b/statismo,kaspermarstal/statismo,clangguth/statismo,heartvalve/statismo,heartvalve/statismo,heartvalve/statismo,statismo/statismo,statismo/statismo,livia-b/statismo,heartvalve/statismo,kaspermarstal/statismo,clangguth/statismo