Issue #2029493 by helmo: Fixed testBackendMethodPost fails on php 5.4.
Issue #1841324 by ergonlogic, greg.1.anderson, anarcat: Requiring php 5.3.5 for Drush is premature.
Issue #2019059 by jp.stacey, ergonlogic: Fixed phpunit installation documentation needs updating.
Rename export outputformat implementation to var_export. Always show json and yaml outputformats in help.