Merge pull request #1 from weltling/simplify

Integrated locks from APC + some fixes
stability
correction
correction
no more references to apc_user_cache in apc_sma
better initialization of sma/cache 1st/3rd party
removal of some more locking from cache ( --APC_ATOM )
remove num_slots from apc.php, useless
cache_create_ex gone, cache_create takes sma
sma takes expunge and data reference
update apcue to work properly, add some testing insert/exists
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no slot level locking, revert to what we know works, for now ...
ws
statefulness
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work on API
+apc_cache_fetch for the feint of heart
+apcue_get/apcue_set examples in apcue
moved copied zvals from globals to context
work on making API uniform
add defense parameter to apc_cache_create
move some stuff from header to cache
tidy up all of cache api to be consistent and sensible
fix tests
fix context->copied memory error
bring iterator/bin inline
consistency
consistency
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