BF: script2obj() make globals==locals

Otherwise import statements in executed scripts have no effect on the
local namespace of their execution, i.e. this would not work

import numpy

def test():
    numpy.arange(5)

as the import goes into the global names space, but the local function
namespace doesn't see it.
NF: Rudimentary export2nifti capabilities for ``dump``
ENH: Enable ``dsinfo`` to print a dataset summary

Optionally overriding the 'targets' attribute for a dataset.
Merge branch 'cmdline_modular' of github.com:hanke/PyMVPA into cmdline_modular