Fix a simple mistake in commit da0497fdf35 which can produce a NameError when installing numpy in MinGW/MSYS2.

MAINT: cleanup use of sys.exc_info

This code originates from python 2.6, before there was an `as` clause in `except`.

This removes all callers of `numpy.distutils.compat.get_exception`.

As numpy is Python 3 only, these import statements are now unnecessary
and don't alter runtime behavior.

When executing pytest --pyargs numpy.distuils.tests.test_fcompiler
test_fcompiler_flags fails with

```
>                   raise e
E                   ValueError: [u'path', u'include', u'lib']

lib\site-packages\numpy\distutils\fcompiler\compaq.py:100: ValueError
---------------------------- Captured stdout call -----------------------------
Unexpected ValueError in C:\TCAgent1\work\7cc6992266387eba\distribution\lib\site
-packages\numpy\distutils\fcompiler\compaq.py
```

It appears that the list argument of ValueError contains 'path' not at the
end of the list like the current test expects, but at the beginning.

After this fix, 9 test failures of `pytest --pyargs numpy.distutils` go away.

In Python 3.6 a number of escape sequences that were previously accepted
-- for instance "\(" that was translated to "\\(" -- are deprecated. To
retain the previous behavior either raw strings must be used or the
backslash must be properly escaped itself.

behavior affect at least python 3.5 and SciPy build and build failed.
During initialization <python>.distutils.MSVCCompiler replace Intel
environment('include' and 'lib' paths). This fix decorate 'initialize'
function in MSVCCompiler and extend 'lib' and 'include' environment
variables. Changed compilation keys: generate optimized code
specialized for Intel processors with SSE4.2 support.

Run the 2to3 ws_comma fixer on *.py files. Some lines are now too long
and will need to be broken at some point. OTOH, some lines were already
too long and need to be broken at some point. Now seems as good a time
as any to do this with open PRs at a minimum.

Add `print_function` to all `from __future__ import ...` statements
and use the python3 print function syntax everywhere.

Closes #3078.