imports in the python lesson

[chendaniely]

The first lesson for the python lesson [1] shows importing numpy and matplotlib.pyplot without an alias. but in the next lesson where we go back to plotting inflammation data [2]
we import glob but the code in the for loop use np and plt aliases.

If students follow the current lesson material, they would not know to import using an alias and will trip up when the code fails

[1] http://swcarpentry.github.io/python-novice-inflammation/01-numpy.html
[2] http://swcarpentry.github.io/python-novice-inflammation/04-files.html

[gvwilson]

@chendaniely is this still an issue?

[valentina-s]

This has been fixed. Thanks!