MapCSS doesn't support boundary matchers

[naoliv]

Was trying to validate something like this:

*[name =~ /\bmotel\b/] {
        throwWarning: tr("foo");
}

but JOSM's MapCSS doesn't support boundary matchers ​http://docs.oracle.com/javase/6/docs/api/java/util/regex/Pattern.html#bounds

[Don-vip]

In 7761/josm:

fix #10806 - support Java Pattern boundary matchers in MapCSS regex - ​http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html#bounds