fixes for pkgeval, improved documentation for example- and doc-buildi… #321

Job	Run time
jupyter (windows-latest, inputs, 1.10, x64, false)	18m 20s
pluto	12m 1s
jupyter (windows-latest, manipulation, 1.10, x64, false)	18m 14s
jupyter (windows-latest, modelica_conference_2021, 1.10, x64, false)	16m 3s
jupyter (windows-latest, multiple_instances, 1.10, x64, false)	16m 38s
jupyter (windows-latest, multiprocessing, 1.10, x64, false)	25m 49s
jupyter (windows-latest, multithreading, 1.10, x64, false)	19m 9s
jupyter (windows-latest, parameterize, 1.10, x64, false)	16m 41s
jupyter (windows-latest, simulate, 1.10, x64, false)	17m 9s
jupyter (windows-latest, parameter_optimization, 1.10, x64, false)	17m 15s
call-docu	1s
	2h 57m 20s

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