#60 Expose offset millis and local millis on DateTime

[VK]

I suggest introducing the following methods to DateTime class (or maybe to one of its superclasses):

public int getZoneOffset() {
return this.getZone().getOffset(this);
}

public long getLocalMillis() {
return this.getZone().convertUTCToLocal(this.getMillis());
}

Without such methods I have to write boilerplate code like this:

int offset = instant.getZone().getOffset(instant))
long localmillis = instant.getZone().convertUTCToLocal(instant.getMillis());

[Stephen Colebourne]

These are low level details that I wouldn't want to expose