remove many unused parse* methods from BLOGUtil
remove many unused parse* methods from BLOGUtil

All we really need is:
- Model.fromString
- Queries.addFromString
- Evidence.addFromString
- BLOGUtil.parseArgSpec for convenience

BayesianLogic/blog,BayesianLogic/blog,BayesianLogic/blog,BayesianLogic/blog,BayesianLogic/blog