Made sure default format response_header can set explicit Content-Type header
Made sure default format response_header can set explicit Content-Type header

wycats/merb,merb/merb,merb/merb,wycats/merb,wycats/merb,wycats/merb,benburkert/merb-core,benburkert/merb-core,merb/merb,wycats/merb