Set the codepage to 65001 before generating
Add check for running on Windows
chcp only needs to run once
Add note about current stable version of Octopress to README.

Fixes #1451.
Merge pull request #1431 from Haacked/windows-code-page-fix

Set the codepage to 65001 before generating
Merge branch 'master' of git://github.com/imathis/octopress into source
octopress updates