Add a spec for non-space-separated encoded-words
Add a spec for non-space-separated encoded-words

RFC-2047 says that encoded-words MUST be space separated, but Gmail and
iOS mail also parse directly adjacent words; so we should too.

kert-io/mail,kaineer/mail,schneems/mail,pjskennedy/mail,0x00evil/mail,smallspark/mail,kjg/mail,owenr/mail,kainlite/mail,benmmurphy/mail,benmmurphy/mail,carsonreinke/mail,missive/mail,jeremy/mail,0x00evil/mail,planio-gmbh/mail,schepedw/mail,yujinakayama/mail,agaridata/mail,kert-io/mail,jeremy/mail,schneems/mail,schepedw/mail,pascalbetz/mail,kjg/mail,kaineer/mail,wktk/mail,smallspark/mail,jeremyevans/mail,zacholauson/mail,jonkgrimes/mail,Schniz/mail,jonkgrimes/mail,EdwardPantoja/mail,EdwardPantoja/mail,mikel/mail,carsonreinke/mail,pushrax/mail,wktk/mail,pushrax/mail,zacholauson/mail,pjskennedy/mail,agaridata/mail,jeremyevans/mail