Added chap6/compareadv
Merge remote-tracking branch 'nthakkar/fvmbook' into fvmbook

* nthakkar/fvmbook:
  Added chap6/compareadv
Added chap10/tvb
Added chap12/efix
Merge remote-tracking branch 'nthakkar/fvmbook' into fvmbook

* nthakkar/fvmbook:
  Added chap12/efix
  Added chap10/tvb