ENH add biosemi layout

imported from fieldtrip
Update docstring
Merge pull request #1581 from t3on/tb-biosemi-ENH

ENH add biosemi layout
Merge pull request #1582 from t3on/tb-doc-ENH

Update docstring
FIX: Fix test
FIX: Cleaner n2ft test
FIX: Speed up and make test more reliable
FIX: Better fixes coverage
Merge pull request #1584 from Eric89GXL/clean-neuro

FIX: Cleaner n2ft test
ENH: Test mne_make_scalp_surfaces
ENH: 3x faster connectivity test
TYPO
Merge pull request #1589 from t3on/tb-epochs-TYPO

TYPO
FIX: Fix test
FIX: Fix decorator
FIX: More standard printing
FIX: Faster test
ENH: No coverage for Py3k (too slow)
Merge pull request #1588 from Eric89GXL/test-scalp

ENH: Test mne_make_scalp_surfaces
FIX Docs. Add missing docstrings for some attributes