Require Automake 1.12 and add serial-tests option
Improve out of bounds error message generated by simplify stage
Add static checking of index constraints where possible
Add dynamic checking of index constraints
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