Fix basic_demo.py
Fix make_distarray.py.
Fix plot_distarray_protocol.py.
Partially fix pi_distarray.

Sum seems to be broken for boolean arrays though.
Fix julia set example.
Fix julia-set bench_dist.
Fix pi_distarray with a custom local function.
Merge branch 'master' into bugfix/fix-examples-for-0.3
Merge pull request #418 from enthought/bugfix/fix-examples-for-0.3

Fix examples for 0.3 release