Emulation of a java.util.regex package, based on gwt-widgets.

As a side note, it's worth mentioning that regular expressions used in GWT will be evaluated in the JavaScript world and not the Java world. There are slight syntactic differences between the two, so while looking up references for regular expressions, you should consult resources for JavaScript regex rather than Java.

Todo : implement a Java to JS regexp converter ? @see gwt emul for String#matches