#6 added random wait times
#9 fixes after review
Merge pull request #20 from krzyk/9

#20: pull request #9 added random wait times
#19 fixed report
Merge pull request #22 from krzyk/19

#22: pull request #19 fixed report
fixes #23: more ctors added to immutable classes
Merge branch 'master' of github.com:jcabi/jcabi-aspects