oc_erchef 0.27.7

Updated deps:

  pooler
    2014-10-01 893f05f Implement take_member queueing

  erlware_commons
    2014-10-01 d4d11ed Merge pull request #71 from wk8/jr/iso8601
    2014-10-01 405c550 Merge pull request #73 from wk8/jr/fix_regex_for_erl_17
    2014-10-01 0b47f60 Have dialyzer run on Travis for OTP 17 too
    2014-09-12 c25dce9 Adding an `ec_test:format_iso8601/1` fun to format datetimes according to ISO8601 standards

  sqerl
    2014-10-06 747ea86 Test blocking take_member