1. Random table fields are now marked deprecated. The deprecation rate is adjustable, default is ~10% of fields.
2. Vector type previously produced a dummy field, now a trivial ubyte vector is generated instead.
3. The fuzzed "instances" were previously generated with identical data, now they are randomized: I suppose such was the intent from the beginning, just wasn't implemented.

I ran the new test with a few different settings and random seeds (but only on Windows + VS2015), and it always passed.

Change-Id: I2014686b6680aec24049ccda3f6deffe5205a83e