PUBAPI-917: Stop complaining when trying to add/read role-tags to /:account
PUBAPI-912: Do not raise an exception when trying "sdc-chmod -- = /whatever"
PUBAPI-915: sdc-policy update help fixed
PUBAPI-905: Fixed sdc-role and sdc-user update help
PUBAPI-934 - reduce from 80 columns, so jsstyle passes.
PUBAPI-904, PUBAPI-928, PUBAPI-930, PUBAPI-931 - make command less
noisy on error (remove bunyan output). If user wants more details,
they can pass in --debug.
PUBAPI-921 - remove mention of 'pair' from tag help.
PUBAPI-920 - remove JSON parsing from err in sdc-getmachinetag.
PUBAPI-902: getmachinemetadata should include credentials, not being set to credentials when "--credentials" is given