Readme.md import usage instructions incorrect

[surfaceowl]

Currently the usage example in the Readme file (and what is posted on pypi) says the user should

"""
from pirev import getInfo
"""

Unfortunately this does not work, from the pirev tests, we see that the correct import is:

"""
from pirev.pirev import getInfo
"""

Recommend a quick update to the Readme.

[jcea]

Hitting this too. Please, update docs.