Support for ANSI "escape&am

[jwdonahue]

Support for ANSI "escape" control codes in build output window.  At least provide support for color text and background.  All of my build scripts and test programs output ANSI control codes to colorize errors, warnings and various levels of other information.

[hs2]

@jwdonahue: Alternatively you could use the SE colorizer. Have a look at this little outdated hint.
HS2