implement UCSD and Nir2011 methods
implemented Wamsley2012 and Ferrarelli2007
widget detect works fine with the 4 methods
removed MINIMA selection method, it was not used
detection spindle clean up
don't compute power peak if not necessary
remove duplicate events from spindles
Merge branch 'detsp_separate' of github.com:gpiantoni/phypno into detsp_separate
substract one from the end index. It's necessary to avoid end of vector errors
keep only peaks of non-duplicated spindles, use float instead of NaN
doc about spindle detect
fix bug for pyqt4, where filename is not a tuple
use a more conservative threshold for UCSD method
clarify help for filter