ENH RawKIT:  error for invalid stim channel
ENH Kit2Fiff-GUI:  allow custom stim channels
TEST Kit2Fiff-GUI
TEST Kit2Fiff-GUI
Merge pull request #1396 from christianbrodbeck/gui-chs

KIT2FIFF GUI: manually set stim channels
ENH: add infomax
address discussion
unicode
fix import errors and typos
address discussion
sum
checkpioint
rewrite Infomax
cosmits
ENH: fix infomax + deprecate + generalzie API
cosmits
py3k fixes
more py3k
silence tests
add infomax test