#6 added Parallel annotation
#6 fixes after review
#6 more fixes
#6 added ParallelException
#6 ParallelException as nested class
Merge pull request #8 from krzyk/6

#8: pull request #6 added Parallel annotation
Merge branch 'master' of github.com:jcabi/jcabi-aspects
site texts improved
serialization marker added
test fix
broken test fixed