added randomString
Removed randomString, of which a similar implementation already exists in soa...

This reverts commit a1417b8cc13e7ad8aab5595763fbc98c742436c1.
always inline set_bit_range
Merge branch 'master' of https://github.com/jeremybarnes/jml
expect_unsigned now returns unsigned numbers
marked worker_task_test as "noauto" rather than "manual"
Merge branch 'master' of https://github.com/datacratic/jml