Bump version to 1.7. Update readme.

pypy doesn't seem to fail on Travis anymore.

Support terminal types, such as kermit and avatar, that use bytes 127…

…-255 in their escape sequences. Close #47.

Replace the weird clear() test with what was originally intended. Thi…

…s one actually fails before the #31 fix.

It's the portability that gets you; you can turn off bold on ANSI ter…

…minals with some bits in the sgr sequence.

Document newly-sugared capabilities, and reorganize readme as new cat…

…egories emerge.

Rejigger readme so code samples are at the top.

Include LICENSE in sdist.

Add tox.ini to the manifest.

Doesn't hurt to ship everything required to run the tests well.

Fix a buggy test that crashed when run with anything but nose-progres…

…sive (which was conveniently calling setupterm() itself).