Add Merb core call stack (yet to be finished).
Add Merb core call stack (yet to be finished).

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