changed error envo url, fixed some errors not being passed, added subtree restrictions on envo term lookups, allowed validation if env_package is vaild in sample sheet but no ep sheet filled out (ep obj created from sample field)
changed error envo url, fixed some errors not being passed, added subtree restrictions on envo term lookups, allowed validation if env_package is vaild in sample sheet but no ep sheet filled out (ep obj created from sample field)

teharrison/pipeline,MG-RAST/pipeline,MG-RAST/pipeline,wgerlach/pipeline,teharrison/pipeline,wgerlach/pipeline,MG-RAST/pipeline,teharrison/pipeline,wgerlach/pipeline