Removed unused function LineParser::readLineOf.
Renamed LineParser to line_parser_t, removed unused type ParseError.
Removed an "equality" operator that was only applicable to unit test code.
Removed a TODO that said another comment was wrong.  Also removed the wrong comment and added an assertion.
Fixed compilation of unit test, removed unused parameter in internal_node.
Renamed is_singleton to is_doubleton.
Made perfmons use cache_line_padded_t in a couple places that seem relevant.
Removed a TODO comment that was TODONE.
Merge branch 'next' into sam_todos
Merge branch 'sam_todos' into next