Set wordmap filename automatically based on model path (and removed -wordmap);
Changed wordmap file format to be cleaner;
Output new wordmap in inference (-inf);
Updated output to include a sparse theta;
Added burn-in (-nburnin) and sampling lag (-samplinglag) options;
Cleaned up model filenames;
Added -infseparately to replace -modelweight;
Cleaned up sampling loops (-est and -inf)