1. Add support for plugins to call certain
Zipr_t functions. This meant making a class
that is Zipr_t and then converting the actual
implementation to a subclass (ZiprImpl_t). The
Zipr_t goes in the zipr_sdk.

2. Ask all plugins about each instruction
and determine whether there are any takers
for plopping.

3. When plopping an instruction, consider
whether or not a plugin asked to do the plopping.
If so, let it do the work.

updated zipr to use add_segment instead of move_segheaders for corredtness and size effeciency for CGC

That's a mouthful: No replop is the default and
the -r option will make it so that dollops _are_ replopped.

that start/end on the same byte are actually
1-byte big. Update tests to confirm this.

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Updates for getting callbacks to work on x86-64.  Includes removing a call to strata_to_data with a use of objcopy which is more stable cross-platform.  Also several warning fixes on return values from fscanf, etc.

improved guard to deal with pinned lock/unlocked insn templates, and avoid mis-translating this idiom if consecutive instructions are pinned.

Updates for x86-64, adjusted memory_space.cpp to have O(ln(n)) complexity instead of O(N) in a few commo cases.

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Partial nonce-code -- should be silent without IRDB relocs added.  Also refactored byte_map into memory_space.

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