compiler: some optimizations.
reduction in policy size. should really switch to sets.
introduce sleeping switches
fix excessive FAnd construction/deconst. Fix obscure NC pred ordering problem
instrumentation for tracking cost
more debug instrumentation
kindergarten optimization, more instrumentation
mininet fix for user switch
increase inactivity probe and reconnect timeouts for OVS
add handy convert_dir.sh utility
add stanford router configs published by HSA paper

local change: did add 'hostname <name>' to each config
modified coza to parse properly
add option to not create subnet root switches
make Sleepy and Lazy mixins for the existing switches

also introduces "ovshtb-notlazy" as a switch which does not have
the lazy mixin
remove much unnecessary bloat in ACL policies.
remove explicit List.x calls, which prevent use of extlist
further ios simplication: acls
stanford: paring down configs, removing unused routemaps
stanford: removed more un-defined route-maps
ios: don't try to process interfaces without any subnet