 add 2nd order difference option to ANTS jacobian and set h to 1 (as opposed to 0.5) 
 add 2nd order difference option to ANTS jacobian and set h to 1 (as opposed to 0.5) 

DaisukeMiyamoto/ANTs,DaisukeMiyamoto/ANTs,stnava/ANTs,fbudin69500/ANTs,dawnsong/ANTs,dawnsong/ANTs,dawnsong/ANTs,fbudin69500/ANTs,stnava/ANTs,acaprihan/Lungs,fbudin69500/ANTs,acaprihan/Lungs,fbudin69500/ANTs,fbudin69500/ANTs,fliem/ANTs,stnava/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,DaisukeMiyamoto/ANTs,acaprihan/Lungs,stnava/ANTs,DaisukeMiyamoto/ANTs,DaisukeMiyamoto/ANTs,dawnsong/ANTs,fliem/ANTs,fliem/ANTs,acaprihan/Lungs,dawnsong/ANTs,fbudin69500/ANTs,fliem/ANTs,dawnsong/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,fliem/ANTs,stnava/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,acaprihan/Lungs,stnava/ANTs,acaprihan/Lungs