Added .c files to setup.py to properly install the new lazylinker_c.c file -- also removed tabs in setup.py

The problem was that the version was obtained *after* importing the C module. As a result,
recompilation would fail because the library was still in use.
This change also saves the version in the __init__.py file of the lazylinker_ext base module,
so that it can be checked without loading the C module.

- can update shared variables internally, so that it does not need
  Function.__call__ to give correct answers.

- it can loop without returning to Python to implement scan (though this is not
  much faster than a for i in xrange(...) f.fn() type thing

- it is versioned now so that it is recompiled when necessary

- the scan test speed is modified to show these things.

* * *
adding test_speed_rnn to scan_test suite