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.

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

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

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

1. Add the ability to rewrite section headers.
We need this because extending sections requires
that their headers be rewritten or the contents
that are in the extended ranges get zero-d.

2. Internally "segmentize" the .strata section
We no longer need to call out to add a segment
for .strata.

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Also, give user an option to override the
detected architecture.

made work on CGC machine.  Added prelim options for linking it callbacks from a separate .exe file.  added verbosity flag.

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