Added file and line information for evals in router.rb.
Added file and line information for evals in router.rb.

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