Update precedence filter to properly handle stepping out of left-recursive rules (fixes #679)
Fix assignment of precedence for binary expressions with an implicit operator (e.g. testDuplicatedLeftRecursiveCall)
Include precedence in rule invocations when -atn is specified
Implement support for defining custom channels in the channels{} construct in lexer grammars (fixes #309)
Place error 160 in the correct order in ErrorType.java
Merge pull request #690 from sharwell/fix-679

Fix applyPrecedenceFilter removing pruning too many configurations
Merge pull request #694 from sharwell/fix-309

Implement channels{} block
add parrt summary of conversation with Sam about precedence DFA optimization
Merge pull request #695 from parrt/prec-filter-comments

add parrt summary of conversation with Sam about precedence DFA optimization