Grow active_nets array at runtime
Start adding a new module to group related nets
Add unit test for group code
Add a large memory test
Require Automake 1.12 and add serial-tests option
Merge branch 'master' into group_nets
Modify rtkern to use net groups
Fix invalid read in fbuf_cleanup
Fix _test_net_flag
Fix several errors in _vec_load and _sched_waveform
Fix sensitivity list for net groups
Fix _last_event
Clean up rtkern
Fix rt_sched_event
Fix bug where state sens_list_t entries were not reused
Optimise netdb_lookup
Reapply earlier optimisations to _sched_event
Get rid of a malloc in rt_update_group
Trick to a void a memcpy when updating 'LAST_VALUE
Store signal data packed rather than as uint64s