Support Doubles
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	After you open, partner responds and RHO overcalls a double 
	by you shows 3 card support for partner's suit and a raise
	shows 4+ card support.  

Example:
	part	opp	you	opp
			1C	p
	1H	1S	x = 3 card heart support
			2H = 4 card heart support


Also,
	part	opp	you	opp
			1C	p
	1H	x	xx = 3 card heart support
			2H = 4 card heart support