Update README.

Updates instructions to use correct case of pip package.

◊ pip install flootty
Downloading/unpacking flootty
  Real name of requirement flootty is Flootty
  Could not find any downloads that satisfy the requirement flootty
No distributions at all found for flootty
Storing complete log in /Users/anthonypanozzo/.pip/pip.log

◊ pip install Flootty
Downloading/unpacking Flootty
  Downloading Flootty-1.10.tar.gz
  Running setup.py egg_info for package Flootty

Installing collected packages: Flootty
  Running setup.py install for Flootty

    Installing flootty script to /usr/local/bin
Successfully installed Flootty
Cleaning up...