Add a test for the recent bugfix

See issue #11.
Add a favicon
Make sure the icon is included in sdists and bdists
Prepare to release 2.0.2
Post-release version bump
Modern pip ignores --use-mirrors
Let's not upload coverage of failed tests
Use a larger font for document title

Closes #12
Fix some test when run under Windows

We assumes os.path.sep == '/', which is not the case on That OS.
Fix remaining test failures on Windows

I'm doing this blind BTW, since working via rdesktop in that infernal
Windows console is a pain.
Try to use slashes in URLs
Mention Windows fixes in the changelog
Prepare to release 2.0.3
Post-release version bump
Claim Python 3.4 support
Fix docstring: the script was renamed a long time ago
Show a clear error when external command fails

Fixes https://github.com/mgedmin/restview/issues/14
Update changelog
Stop mangling document titles

Fixes https://github.com/mgedmin/restview/issues/15.
Release 2.0.4