FallthroughPatched: This is whether or not the
fallthrough to the subsequent dollop has been
converted into a jump instruction that has
been added to the dollop. This affects future
size calculations.

Coalesced: This is whether or not this dollop
has been coalesced with its fallthrough dollop.
This affects size calculations.

Add support for tracking dollop entry membership in dollop and retrieving a dollop entry's fallthrough in a dollop.

Broken version being committed, so will can commit his broken version so we can both finish our hacking without dealing with repo conflicts.

This reverts commit d781da1f2ca0b6deb1eb167704458324cf4c81b0.