DOC: Added tutorial to docs

adopted from https://github.com/MichielCottaar/cifti/blob/master/README.md

Added CIfTI to list of supported file formats

replaced CIFTI with CIfTI2

Author: MichielCottaar

doc/source/api.rst

@@ -23,6 +23,7 @@ File Formats
    analyze
    spm2analyze
    spm99analyze
+   cifti2
    gifti
    freesurfer
    minc1

nibabel/cifti2/__init__.py

@@ -6,14 +6,15 @@
 #   copyright and license terms.
 #
 ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
-"""CIfTI format IO
+"""CIfTI2 format IO
 
 .. currentmodule:: nibabel.cifti2
 
 .. autosummary::
    :toctree: ../generated
 
    cifti2
+   cifti2_axes
 """
 
 from .parse_cifti2 import Cifti2Extension

nibabel/cifti2/cifti2.py

@@ -12,12 +12,9 @@
 
     http://www.nitrc.org/forum/message.php?msg_id=3738
 
-Definition of the CIFTI2 header format and file extensions attached to this
-email:
+Definition of the CIFTI2 header format and file extensions can be found at:
 
-    http://www.nitrc.org/forum/forum.php?thread_id=4380&forum_id=1955
-
-Filename is ``CIFTI-2_Main_FINAL_1March2014.pdf``.
+    http://www.nitrc.org/projects/cifti
 '''
 from __future__ import division, print_function, absolute_import
 import re