Terminals use EBNF lexer, not old one defined in Turtle.
SolutionModifier doesn't reject empty input.
Added more SSE files and correct for expected output.
Depend on 0.1.0 of sxp gem.
Improved parser tables and use ebnf 0.2.1
Fix embedded newline issues with NIL and ANON terminals
Run all syntax and evaluation tests to check for expected output. Also run negative syntax tests.