added make target to build api docs
added make target to build api docs

teharrison/MG-RAST,teharrison/MG-RAST,wilke/MG-RAST,MG-RAST/MG-RAST,wilke/MG-RAST,teharrison/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,wilke/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,MG-RAST/MG-RAST,teharrison/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,paczian/MG-RAST,MG-RAST/MG-RAST,paczian/MG-RAST