Version 0.1

This marks the version 0.1 of HyTest. Changes from the first commit:

• The README example isn't littered with typos and actually works! (thanks to @tianon)
• Stdout and stderr are now captured
• You can explicitly fail a test
• A warning is emitted when two tests with the same name are created
• Setuptools now actually works (thanks to @oyvindrobertsen)
• Various Python 3 fixes
  • Skipping works
  • You don't get "During handling of..." with the raises* comparators
• You can now access global variables from tests
• HyTest follows the style guide
• PyPy works
• Setup script fixes
• Failed tests now throw FailException instead of AssertionError
• Travis CI support