Clarify shebang lint warning.
NPC-400 #comment Adds vector file sensor test in unittest format and adds relevant data files.
Pylint fixes for vector_file_sensor_test.py.
Further clarification on all executable messages.
Redo lint warning messages to make it easier to understand in some cases where there is no __main__ block.
Slight simplification of vector file sensor test.
Merge pull request #272 from scottpurdy/vector_file_sensor_test

Vector file sensor test
Merge branch 'master' of git://github.com/numenta/nupic
More minor fixes.
Merge pull request #271 from scottpurdy/master

Clarify shebang lint warning.
Merge branch 'master' into arithmetic-encoder