First stab at a `reset_cluster` target.

Removes all engine modules that start with "distarray".

Probably needs refinement to get working fully.
reload -> reset
No longer `eval()` user command in ipcluster.py.
Merge branch 'master' into feature/reload-cluster

Conflicts:
	Makefile
Merge pull request #229 from enthought/feature/reload-cluster

First stab at a `reset_cluster` target.
Fix a couple of .PHONY lines that were out of sync.
Documentation fix in utils.mirror_sort. PEP8.
Merge pull request #233 from cowlicks/utils-fix

Documentation fix in utils.mirror_sort. PEP8.
Merge pull request #234 from enthought/bugfix/fix-make-phonys

Fix a couple of .PHONY lines that were out of sync
denselocalarray -> localarray in client.py and decorators.py
denselocalarray -> localarray in denselocalarray.py
denselocalarray -> localarray in __init__.py
denselocalarray -> localarray in random.py
Move Context tests to test_context.py
Remove Context tests from test_client.py
Ignore .parallel_out directory.
denselocalarray -> localarray in paralleltest_*.py
move denselocalarray.py -> localarray.py
Remove dummy localarray function which had same name as module.
Merge pull request #239 from cowlicks/move-localarray

denselocalarray -> localarray