Add fix and test for truncation of float constant
Fix various issues

- don't need to defer evaluation of scalar binary operations
- run tests with use_python=False by default
- add numpy module to global namespace in codegen.py
Refactor vectorize code generation for array object
Fix aray object reduce_ and examples
Add support for where function
Merge branch 'array_object' of git://github.com/numba/numba into new_array
added Jay's changes to branch
Conflicts:
	numba/array/array.py
	numba/array/codegen.py
	numba/array/examples.py
	numba/array/test_ufuncs.py
	numba/array/ufuncs.py
removed the + in vectorized+_body in codegen.py
removed division and floor_division from __init__.py
updated datatypes to test in test_ufuncs.py