add keystone support (see commits to iron_core)
add keystone info to README
add keystone info to README
small fixes in README
Merge pull request #83 from sunloverz/v3

Actualize to v3 and small fixes
Merge pull request #84 from sunloverz/v3

Completed v3 test suite
Merge pull request #82 from pyeremenko/v3

add keystone support
do not check token/project for keystone
Updated to minitest 5.
(cherry picked from commit beb395c)
Updated a bunch of tests to work with new minitest and IronMQ v3.