Changed PTNode.rule->rule_name. rule is now a reference to ParsingExpression.
Fix in debug message
WIP on textX. textX reference file parses. Model is still not properly constructed.
Reworked cross-refs resolving in textx parser construction.
NoMatch exception now has reference to PEG rule that caused it.
Removed superfluous return from Combine decorator
Added more info to debug message in ParsingExpression
Rule may override explanation message in NoMatch
Change the way non-terminals are created in the parse method
Fixing peg language
Fixing peg_peg example