shimatta/shellmatta: A tiny and flexible shell implementation to be used on embedded devices. @ a475c7009d30a06f275b9b34b2586b25a6ade62b

stefan a475c7009d added testcases for requesting the transport layers sequence counters		3 lat temu
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framework	e6b45952b3 added tests for shellmatta_history and improved documentation	4 lat temu
integrationtest	a475c7009d added testcases for requesting the transport layers sequence counters	3 lat temu
unittest	ebf0e28843 refactored crc module and added simple unittests	3 lat temu