Added tests for additional monad ops, default record field values, and some new, minor bugs, and implemented the monad ops.
Tests for minor bugs.
Tweaked a comment and updated test results.
Added BENCH syntax and tests, and test for TEST/BENCH on the first line of a file.
Fixed an obvious typo that caused a spurious diff.
Added a test for offset 'let' inside parens.
Updated tests.
Merge pull request #104 from pszilagyi/master

BENCH syntax support and tests for various minor bugs and changes