#48: all classes in hosts are immutable
#48: all tests fixed in hosts
#48: test to reproduce a problem with unflushable cache
#48: test disabled
#48: relay annotated
#48: authentication moved to rexsl
#48: RestUser introduced
#48: layout fixes
#48: jcabi 0.7.14
#48: rexsl 0.4.8
#48: rexsl and jcabi SNAPSHOT
#48 Loggable moved to class level
#48: REST works with latest rexsl and jcabi