Update MCL API documentation. #257

Job	Run time
build (linux-amd64)	1m 10s
build (linux-x86)	1m 6s
build (linux-i386)	1m 5s
build (windows-x64)	2m 28s
build (windows-x86)	1m 47s
runtimes (testscript)	1m 15s
tools	1m 42s
test_e2e	1m 11s
docker_push (simer)	58s
publish (linux-amd64)	9s
docker_push (testscript)	24s
containers (modelc, linux-amd64)	32s
publish (linux-x86)	10s
containers (modelc-x86, linux-x86)	32s
publish (linux-i386)	9s
containers (simbus-sa, linux-amd64)	21s
publish (windows-x64)	9s
publish (windows-x86)	6s
	15m 14s

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