SF: only show profile, phasic events submenus where appropriate
new functions agh::str::dhms(double seconds)
clamp values in CEDFFile::put_region
consider physical_range of type double
avoid passing by ref assignable lvalues to sigproc::envelope
put file name in 'reserved' field in CEDFFile ctor
make edfcat more competent at finding ranges; zeromean converted signal

and report outliers