Merge pull request #163 from tanmaykm/tanmaykm

backup/restore and auto-scaling changes
Merge pull request #164 from tanmaykm/tanmaykm

ipython changes to fix notebook export. fixes #162
Merge pull request #168 from tanmaykm/tanmaykm

added cairo & graphviz, plus misc changes
Merge pull request #169 from tanmaykm/tanmaykm

added patchwork
zmq socket bind only to internal ip