Removed unused and undefined function declaration op_term_t::consume.
Marked a method const, whatever.
Removed pointless std::move return.
Made args_t explicitly noncopyable.
Fixed trivial style problems.
Made error messages not use "argument(s)".
Try to spin up another instance if the port is already used
Fix comment
Clean up
Merge branch 'next' into sam_2568

Conflicts:
	test/rql_test/src/arity.yaml
	test/rql_test/src/control.yaml
	test/rql_test/src/meta/table.yaml
	test/rql_test/src/mutation/replace.yaml
	test/rql_test/src/mutation/update.yaml
	test/rql_test/src/selection.yaml
Removed "(s)" pluralization in util.coffee.
Removed "(s)" pluralization in ast.py.
Removed "(s)" pluralization in func.rb.
Removed (s) expectation from rql_test/connections/{cursor.js,promise.js}.
Fixed missing syntax in cursor.js.
Fixed direction of "plural" function in util.coffee.  (Sigh.)
Generated docs for 1.13.1
Release notes for 1.13.1
Bump driver versions
Add late fix to the NOTES file