Added a TABLESWITCH bytecode implementation, fixed a couple more object references, and fixed two bugs, that caused segfaults when built with "-O" gcc optimisation flag. This brings a nice speed-up of 0.6 seconds on "Hello, World!" (around 33%), but the software version benefits from it too, when similarly fixed, and still keeps us just above 10% behind on this test. All fixes committed to the git
repository.
