Add generic checks for library presence and allow golang 1.7 (#870)
Add generic checks for library presence and allow golang 1.7 (#870)


Oncilla/scion,klausman/scion,dmpiergiacomo/scion,FR4NK-W/osourced-scion,klausman/scion,Oncilla/scion,netsec-ethz/scion,dmpiergiacomo/scion,FR4NK-W/osourced-scion,netsec-ethz/scion,FR4NK-W/osourced-scion,Oncilla/scion,netsec-ethz/scion,netsec-ethz/scion,FR4NK-W/osourced-scion,dmpiergiacomo/scion,klausman/scion,klausman/scion,klausman/scion,FR4NK-W/osourced-scion,dmpiergiacomo/scion,dmpiergiacomo/scion,Oncilla/scion,dmpiergiacomo/scion