neither... nor/RelEx
some correction
remove _det
unit test/Correlative
fix either..or
conj_but
remove incorrect negetive representation
fix negative rule
create conj_neither_nor()
fix unit test /correlative
neither--nor correction based on linas link-parser fix
either--or correction based on linas link-parser fix
remove unnecessary rule
remove wrong criteria
Merge pull request #117 from rodsol/correlative

neither... nor/RelEx

I am merging this because it has been pending since June, and ther don't seem to be any objections to it.