Add CTPS method to detect artifacts
add unit tests
actually add tests
generalize thresholding
cosmits
update examples, fix make ecg bug, add reference
address discussion
test vectorization
cosmit
0.25 as ctps threshold
add whats new + address discussion
cosmits
cleanup maths
make examples nicer
cosmit
Merge pull request #1359 from dengemann/ctps

ENH: Add CTPS method to detect artifacts
STY: replace Evoked(None) generator with EvokedArray
same for epochs averaging
same for epochs averaging mod
deepcopy to avoid changing epochs params