gaudi: use /opt/lhcb-sw as MYSITEROOT
lhcb: use /opt/lhcb-sw as MYSITEROOT
gaudi: add which as dep
lhcb: add which as dep
lhcb+gaudi: use pkr to install
lhcb+gaudi: remove ROOT-6 binaries
slc-dev: add which as a dep
slc-dev: bump go-1.2.2