move xcorr inds to xcorr.py
clean up normalize and add columns creator
use slicing instead of a loop
be more clear about using False in clear_refrac.pyx
propagate exceptions
use const char since cython 0.18
remove some keyword arguments
remove datetime index in xcorr since it does not plot correctly
refactor and check for duplicate file pointer locations
update docs
add six to requirements.txt
whoops use scalar
mark blocksize as const
return argmax instead of computing later
use is for nullcheck
use Py_ssize_t
add ability to give non MultiIndex s to xcorr columns
remove matching and use try blocks
make refractory-period-clearing test more replicable
update travis stuff