data_record_size can be a float in edf+ files
catch exceptions from stof when parsing "EDF Annotations"
agh::str enhancements: reentrant tokens, tokens_trimmed; wstring conv functions
unbreak CEDFFile::_parse_header wrt "EDF Annotations" channel
less strict parsing of PatientId, just drop 5th and extra subfields
use strtok_r elsewhere in CEDFFile::_parse_header
fix CEDFFile::_extract_embedded_annotations
CEDFFile::details takes a bitfield, reports annotations and discontinuities
bind F1-3 to cycle combos on main window
refactor ext-filters, fix one uninitialised, but useful, read
fix ccw cycling of mw combos via F1-3
all annotations and artifacts have ts relative to recording start
properly collect recording-wide annotations from all channel sources on SF

also fix var names after code copypaste in sf/montage.cc
set SScoringFacility::da_wd for the casual use before it gets set properly
fix outstanding drawing regressions after enabling rel-ts annotations/afs
don't let a double be a valarray index
ICM, update ChangeLog