when loading mapped entities.   The function overhead of applying
a per-object deferred callable to an instance at load time was
significantly higher than that of just loading the data from the row
(note that ``defer()`` is meant to reduce DB/network overhead, not
necessarily function call count); the function call overhead is now
less than that of loading data from the column in all cases.  There
is also a reduction in the number of "lazy callable" objects created
per load from N (total deferred values in the result) to 1 (total
number of deferred cols).
[ticket:2778]

- went through examples/ and cleaned out excess list() calls

become an externally usable package but still remains within the main sqlalchemy parent package.
in this system, we use kind of an ugly hack to get the noseplugin imported outside of the
"sqlalchemy" package, while still making it available within sqlalchemy for usage by
third party libraries.

all platforms.  let's instead store callcounts for *all* observed platforms in a datafile.
Will try to get enough platforms in the file for jenkins to have meaningful results.
for platforms not in the file, it's just skiptest.

parts of the pstats that are idiosyncratic to different platforms.
the goal is no per-version assertions on tests, version differences
in theory would go into the list of profiling exceptions.