Remove global world context.
Remove _from_dim_data tests. Make some global_dim_data tests.
Remove _from_dim_data from context.py
Merge pull request #323 from cowlicks/rm-world

Remove global world context.
Resolves regression with "OSError: too many open files."

Changes Context creation to require explicit Client to be passed in.
Restore previous Context.__init__ API w/ default client.
Forgot to cleanup `test_maps.py`
Merge pull request #325 from enthought/bugfix/cleanup-regression

Fixes "Too many files open" regression on OS X
Rename local.maps.NDMaps to local.maps.Distribution
Distribution.from_dim_data -> Distribution.__init__

As discussed, a Distribution object should take a dim_data in its __init__.  There was no __init__ previously.
Whitespace.
Re-add irregular block globla_dim_data test.
Print file count before and after tests in travis.
test_from_global_dim_data_bb -> test_irregular_block_assignment.
Move the client map tests into their own file...

and out of the local map tests.
Move open file count to right after `dacluster start`
Merge pull request #326 from enthought/feature/local-ndmap-rename

Local MDMap renaming
Merge pull request #316 from cowlicks/kill-from-dim-data

Remove _from_dim_data and its tests.
Merge pull request #328 from enthought/refactor/make-test-client-map

Move the client map tests into their own file...
Merge pull request #327 from cowlicks/open-files

Print file count before and after tests in travis.