Version 0.4.3

FEATURE: DCOS oauth support
FEATURE: DCOS-CLI is now only one executable
FEATURE: Documentation rewrite
FEATURE: Add "selected" column in search results
FEAUTRE: Contributing + Issue templates
FEATURE: Improved check for cosmos enabled cluster
FEATURE: Config changes now print to stderr
FIXED: Separation of unit and integration tests
FIXED: core.dcos_acs_token no longer gets printed