[converters/sb2numpy.py] updated to a working example, fixed python3 compatibility and updated naming scheme to reflect SentiBoard

[parsers/sensors/adis_parser.py] fixed indentation issue caused by earlier merge with restructure/sentisystems branch

[loggers/sentiboard_logger_opt1.py] Fixed relative import path and commented out code dumping SentiBoard buffer at start up.

[parsers/package_counter.py] made script python3 compatible and added support for trigger/IC only packages

SentiSystems restructure

See merge request senti/sentiboard-utils!20

# Conflicts:
#   parsers/sensors/adis_parser.py

parsers: implemented interrupt_parser for handling trigger packets, also fixed import path of parsers.utils across scripts

parsers/package_extractor: made default package extractor handle raw SB v1.2/v1.3 data dumps (old_style = False and _is_serial = True)

Time is assigned as UTC seconds (uint64) and UTC nanoseconds (int32)