Change the YAML parser to syck due to problems with psych when dealing with key merges.
Change the YAML parser to syck due to problems with psych when dealing with key merges.

See http://redmine.ruby-lang.org/issues/4300 and 4357.

10xEngineer/shapado,stan/shapado,ricodigo/shapado,ooohiroyukiooo/shapado,gravityrail/shapado,cctuan/shapado_g,gravityrail/shapado,amyhua/QnA,sinnerex/zoorab,NazarK/shapado,cctuan/shapado_g,10xEngineer/shapado,ricodigo/shapado,cctuan/shapado_g,amyhua/QnA,gravityrail/shapado,ricodigo/shapado,amyhua/QnA,10xEngineer/shapado,NazarK/shapado,NazarK/shapado,ooohiroyukiooo/shapado,stan/shapado,stan/shapado,ooohiroyukiooo/shapado,ooohiroyukiooo/shapado,sinnerex/zoorab,sinnerex/zoorab,stan/shapado