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.

  - bootstrap and lib move to all absolute imports
  - testing.py is no longer internally referenced.
  - requirements move to be a pluggable class which can
    be overridden.
  - cleanup

in the interests of third party testing, test/lib and test/bootstrap
may move to be an independent package.

- epic documentation sweep for new operator system, making ORM links consistent
and complete, full documentation and examples for type/SQL expression feature
- type_coerce() explicitly accepts BindParamClause objects
- change UserDefinedType to coerce the other side to itself by default as this
is much more likely what's desired
- make coerce_compared_type() fully public on all types
- have profiling run the test no matter what so that the test_zoomarks don't fail
when callcounts are missing

that of the ORM so far.

- OK lets try again...

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.