WIP (HOA-path) FormulaParser: parse HOAPathFormula

Note: Syntax of HOA path formulas will change!

 Conflicts:
	src/storm-parsers/parser/FormulaParserGrammar.cpp
	src/storm-parsers/parser/FormulaParserGrammar.h

src/storm-parsers/parser/FormulaParserGrammar.cpp

@@ -75,7 +75,6 @@ namespace storm {
 
             untilFormula = pathFormulaWithoutUntil(qi::_r1)[qi::_val = qi::_1] >> *(qi::lit("U") >> (-timeBounds) >> pathFormulaWithoutUntil(qi::_r1))[qi::_val = phoenix::bind(&FormulaParserGrammar::createUntilFormula, phoenix::ref(*this), qi::_val, qi::_1, qi::_2)];
             untilFormula.name("until formula");
-            conditionalFormula = untilFormula(qi::_r1)[qi::_val = qi::_1] >> *(qi::lit("||") >> untilFormula(storm::logic::FormulaContext::Probability))[qi::_val = phoenix::bind(&FormulaParserGrammar::createConditionalFormula, phoenix::ref(*this), qi::_val, qi::_1, qi::_r1)];
 
             hoaPathFormula = qi::lit("HOA:") > qi::lit("{")
                 > quotedString[qi::_val = phoenix::bind(&FormulaParserGrammar::createHOAPathFormula, phoenix::ref(*this), qi::_1)]