Fix compitability with all java from 8 to 12#83

Merged

pesse merged 4 commits intodevelopfrom

May 9, 2019

Commits on Apr 30, 2019

Commits on May 1, 2019

fix type and remove sudo requirement as it seems it's not needed at all
Pazus
committed

Commits on May 5, 2019

implemented tests on jar file so we can be sure extraction from jar works correctly
Pazus
committed