Fix: warnings complaining the IPython lexer

When building docs, sphinx was spiting out warnings because IPython's
lexers are unknown. Added the necessary extensions to sphinx config
file.
Merge pull request #901 from oesteban/bug/AddIPythonLexer

Fix: warnings complaining about unknown IPython lexer
Merge remote-tracking branch 'upstream/master' into enh/restingconn

* upstream/master:
  Fix: warnings complaining the IPython lexer
  sty: white spaces
  enh: added script for using ANTS instead of FNIRT for openfmri processing
  fix: support for FSL 5.0.7 changes to FILM_GLS
Merge remote-tracking branch 'origin/enh/restingconn' into enh/restingconn

* origin/enh/restingconn: