Add UTF-8 Support to High Ansi Generation

Render High ANSI characters in UTF-8 to increase compatibility with
Ruby `String.encode` and view output.
Version bump to 0.2.0

Minor version bump for compatibility changes in character format.
Refactor tests for UTF-8 Support
Update Changelog for 0.2.0
Make UTF-8 generation compatible with non-1.9 Ruby implementations
Make UTF-8 generation compatible with non-1.9 Ruby implementations
Ensure that CharSet preserves multibyte characters
Merge pull request #3 from josephjaber/utf8

Add UTF-8 Support to High Ansi Generation