ENH docstring is now PEP8
FIX small fixes in numpydoc's titles

Numpydoc does not accept the following titles
  - Note (should be Notes)
  - Example (should be Examples)
Merge pull request #2201 from NelleV/MEP10_fixes

FIX small fixes in numpydoc's titles
Merge pull request #2200 from NelleV/PEP8_docstring

ENH docstring is now PEP8
DOC acorr is now in numpydoc format
DOC nitpicks on the acorr methods
Merge pull request #2204 from NelleV/MEP10_acorr

MEP10 acorr methods
Try importing PySide, if we can't find sip.

If no QT_API is specified, we use the value in rcParams and the
default value for this is PyQt.  If a user has PySide installed,
trying to use the qt backend fails, unless QT_API is specified or the
config file is modified.  This commit, adds code to try and import
PySide, if an import of PyQt fails.
[DOC] Add documentation for the QT_API environment variable.
Merge pull request #2142 from punchagan/fix-qt-import

Try importing PySide, if we can't find sip.
DOC annotate is now in numpydoc format
DOC fix typo in the annotate method
Merge pull request #2208 from NelleV/MEP10_annotate

DOC annotate is now in numpydoc format
Fixing small typo in the plot tutorial.
Merge pull request #2215 from josericardo/master

Fixing small typo in the plot tutorial.
Typo
Merge pull request #2220 from felipeacsi/master

Fixing typo in docs
MEP10 axhline and axvline are now in numpydoc format
DOC modified sphinx's layout.hml

The previous sphinx layout relied on overriding a default template.
It meant we could not easily add links and other things in the header.
The new layout does not inherit from anything, hence makes it easier
to tune.
DOC the space between titles and the rest is now bigger