DOC : windows install docs from cgohlke
Merge pull request #3270 from tacaswell/win_install_docs

DOC : windows install docs from cgohlke
DOC : change how OO/pyplot/pylab is addressed

I assume this will be controversial

Addresses #3115
DOC : grammer fixes and doc edits

 - removed from pylab import *
 - changed some wording
DOC : edits to usage_faq.rst
Merge branch 'v1.4.x'

* v1.4.x:
  DOC : edits to usage_faq.rst
  DOC : grammer fixes and doc edits
  DOC : change how OO/pyplot/pylab is addressed
  DOC : windows install docs from cgohlke