Display to full terminal width

Currently working on Py3 only. Need to set COLUMNS
environment variable on Py2. See #5
Add AUTHORS.rst
Fix incorrect install_requires and add dev-requirements.txt
Fix get_terminal_width error on Py2
really fix it this time...
Add date next to version number
Fix repr and tests
Fix full-width display. Thanks @livibetter
Make sure bargraph shows at least one tick if there is > 1 download
Updae README
Py3 fix: reversed must take a sequence
Remove setuptools requirement
Bump version -> 0.2.0