Update pip (1.4 -> 1.4.1)
Update setuptools (0.9.7 -> 1.0)
Update changelog
Fix spelling error
Merge pull request #53 from stephendavis89/master

Fix spelling error in README
Installation instructions for any installation directory.

Updated README.md contents so that installation instructions cover
not only the common case for installation directory, i.e. `~/.pyenv`
but any other at the user's choice.
Merge pull request #54 from apbarrero/alternative_install

Installation instructions for any installation directory.