fixing r.binary as a key
changing key ordering so that binary sorts as a pseudotype, and fixed pseudotype ordering in datum_t::cmp
fixing secondary key format for common prefixes - this breaks sindex compatibility with previous versions
adding test for index sorting
fixing test-runner for using a running server instance
remove redundancy in an error message
Merge branch 'next' into grey_binary_sindex

Conflicts:
	test/rql_test/src/math_logic/comparison.yaml
Merge branch 'grey_binary_sindex' into next