#48 Escape character functions

[Austin Rappa]

This file adds support for escape characters such as carraige return (cr), line feed (lf), carraige return line feed (crlf) and tab. I found in certain String fields such as the echo task or the foreach task's delim attribute where these would be benefitial.

Example:
<echo message="hello ${char::crlf()} world" />

[Austin Rappa]