Added threading, because, why not?
auto-complete went weird on the previous commit.
Added threading, because, why not?
if any model sub-thread fails, invalidate the entire super-thread.
Add threading for url porting and image saving in publish.py.
Merge branch 'threading' of https://github.com/plotly/documentation into threading

Conflicts:
	run.py
making new code pep8 compliant.
Merge pull request #29 from plotly/threading

Threading