use SingleOrDefault in RuleRawWithMove
minor BnfiTermMember NodeCreator changes
undo "use SingleOrDefault in RuleRawWithMove"
Merge branch 'master' into BnfiTermMember_change

Conflicts:
	Sarcasm/Ast/BnfiTerms/BnfiTermMember.cs
Resolved
fix parse bug by using ReduceHere() in BnfiTermMember
fixed MemberValue.ToStringValue null reference bug
RegisterOperators modifications
MiniPL
merged from master
proper tests
Merge branch 'master' into BnfiTermMember_change