Removed dead code when using the simple LAR representation.
Added gdb debug flag in run_lar.sh.
Removed command-line switch -nogc.
VERBOSE_GC is now just (un)defined.
Cleanup in run_lar.sh.
Back to simple LARs with GC markers.
Added GICFLAGS in run_lar.sh.
Add run_lar.sh in tests (commented out).
Better integration with the 'simple' and other LAR representations.