Addendum for `pyenv install` usage

This gives users an idea of which versions of python are available. Other version managers ([nvm](https://github.com/creationix/nvm), [rvm](https://rvm.io/rubies/list), etc) tell users how to list available versions as well.
Merge pull request #125 from shurane/patch-1

Addendum for `pyenv install` usage
Display warning if the PyPy is not built for the distro (#122)
Merge branch 'pypy-binary-compatibility'
Simplify anaconda/miniconda definitions
Add CPython 3.3.5 (closes #127)
Remove release candidates of CPython 3.3.5
Add CPython 3.4.0rc3
Update setuptools (2.2 -> 3.1)
Update changelog
v0.4.0-20140311
Add /anaconda-(1.9.0|1.9.1)/ and /miniconda3?-(3.0.4|3.0.5)/