erchef 1.2.20

Removed deps:

    automeck
    emysql

Updated deps:

  sqerl
    2013-08-06 815bae8 Merge branch 'sf/remove-mysql'
    2013-08-06 4af85c7 Remove unused testing dependency automeck
    2013-08-06 b51c7bd Remove mysql support from sqerl
    2013-08-05 8be4c95 sqerl_pgsql_client should not be a system process
    2013-08-05 bce94d7 Merge branch 'sf/on-demand-prepare'
    2013-08-05 dd036b4 Cleanup return value for internal prepare_statement function
    2013-08-05 e57d2d2 Refactor pqc_fetch to use a PrepareFun fun
    2013-08-05 422385f Ignore sqerl.plt generated file
    2013-08-05 8b6cc2c Add test coverage for sqerl_pgsql_client internal pqc_* functions
    2013-08-05 e43684a Less verbose eunit output makes pass/fail easier to read
    2013-07-29 38ddf18 Remove unreachable code resulting from pooler upgrade
    2013-07-29 710659c Prepare queries on-demand instead of at client start