Adds characters for U/udieresisbelow to address issue #184.
Updates GSUB features to prevent alternates from blocking formation of small capitals, addressing issue #183.
Adds double circumflex and double macron above to address issue #179.
Attempts to resolve issues with combining dot above right to address issue #178, however there is still some remaining funniness in interaction with text engines and how the character string is formed.
Adds characters for IPA affricate ligatures dzed, dzcurl, tccurl, dzretroflex & tshook to address issue #174.
Converts Sources to UFO version 3 to address issue #148.
Adds heavy quote ornaments because I like using them as ‘scare’ quotes.
