Implement Dump/Load manually.

For classes which have heretofore relied on CFCDumpable for
autogenerating Dump/Load, create manual implementations.
Remove CFCDumpable.

CFCDumpable is obsolete since we are no longer using it to autogenerate
implementations for Dump/Load -- remove it.
MatchAllQuery is not abstract.
Strip "dumpable" attribute.

The "dumpable" attribute was used to help determine which classes needed
autogenerated Dump/Load.  It is now obsolete, so zap it.
Remove "autocode" from CFCClass.

The "autocode" member var used to hold autogenerated code for Dump/Load.
It's no longer needed.
Remove class "attributes" from Clownfish.

Remove the "attributes" misfeature from Clownfish, now that we don't
need it to support "dumpable" any more.
Address minor compiler warnings.

Zap a couple unused vars.  Add a cast.
Add dump() and load() to Freezer.
Use Freezer instead of Dump/Load.

Instead of invoking Dump/Load methods on Obj, Hash and VArray object,
use Freezer_dump and Freezer_load.
Remove VTable_Load_Obj.

VTable_Load_Obj is an inefficiently implemented convenience method.  Zap
it.
Update test for `nullable` to avoid Dump().

Change the test for the behavior of Perl wrappers around `nullable`
return values to use Inc_RefCount() instead of Dump().
Finish moving Dump/Load from Clownfish to Lucy.

Remove Dump/Load methods from the Clownfish runtime and move their
binding specs up into the Lucy classes that need them.
Use full paths so recent svnmucc doesn't complain.
Add commands for managing release tags.