removed stdin usage of yuicompressor in favor of an input file
removed stdin usage of yuicompressor in favor of an input file

stdin appears to have size limitations in some environments

reverts 75713f806fd514eb24ae97d33dd0afeed3a091b8
dtee/assetic,lellimecnar/assetic,Sgoettschkes/assetic,Sgoettschkes/assetic,matthiasmullie/assetic,kriswallsmith/assetic,webmozart/assetic,shandy05/assetic,kriswallsmith/assetic,Sgoettschkes/assetic,lellimecnar/assetic,renaatdemuynck/assetic,lenar/assetic,lenar/assetic,lellimecnar/assetic,sportradar/assetic,shandy05/assetic,fredemmott/assetic,kriswallsmith/assetic,Sgoettschkes/assetic,fredemmott/assetic,mubassirhayat/assetic,renaatdemuynck/assetic,lenar/assetic,matthiasmullie/assetic,dtee/assetic,stof/assetic,sportradar/assetic,sportradar/assetic,webmozart/assetic,lenar/assetic,mubassirhayat/assetic,matthiasmullie/assetic,renaatdemuynck/assetic,stof/assetic,lellimecnar/assetic,webmozart/assetic,shandy05/assetic,mubassirhayat/assetic,shandy05/assetic,matthiasmullie/assetic,renaatdemuynck/assetic,kriswallsmith/assetic,fredemmott/assetic