1. Update semantics of how plugins determine
   the size and space of the dollop that they
	 will plop. 
2. Add sorting for plugin invocation based on
   lexigraphical sorting.

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This is important for a number of reasons. 
Most importantly, however, is the fact that it
will cause a problem with the push64 relocations
calculations.

This fixes a bug where dollop creation incorrectly
continued past IBTs. IBTs should always start a
dollop and this fixes that.

Move functionality to determine if a dollop for
an instruction already exists and whether to split
the containing dollop into AddNewDollop and use
that to implement UpdateTargets.