Unicode Improvements.

This addresses some long-term rendering problems with Emoji

Windows build improvements.

v1.5.1

Do not compile HeadlessTerminal on Windows as it uses LocalProcess, w…

Major performance improvements.

1.5.0

Fix test warnings, disable Windows features

1.2.1: Merge pull request #289 from migueldeicaza/cursorRenderContentsOnLayer

The caret will now render the character underneath it.