Merge pull request #25 from gnperdue/gnp_vle

Gnp vle
Adding script for config
Merge branch 'master' into gnp_vle
Merge pull request #26 from viyer28/gnp_vle

Gnp vle
Check if target is nucleus before displaying error message
Added changes so nucleon targets in nucleus were interacted based on helicity
Merge pull request #29 from viyer28/gnp_vle

Gnp vle
Fix a typo in the config script.
Start to clean up target checks