added notes in the README about lonely collections and hashes. thanks to stuart corbishley for his naming.
added notes in the README about lonely collections and hashes. thanks to stuart corbishley for his naming.

Casecommons/representable,parndt/representable,tastyworks/representable,jajuki13/representable,apotonick/representable,rusikf/representable,tastyworks/representable,simonoff/representable,irfanah/representable