4.2.0

DP-39 [3.0] The background is too small on the homepage
DP-181 DreamFactory on the AWS Marketplace
DP-184 Integrate license keys into hosted environments
DP-194 Fix dreamfactory/df-core — deprecation warning
DP-195 Fix dreamfactory/df-email deprecation warning
DP-196 Fix hasRole method
DP-197 Windows IIS install File Upload does not work
DP-199 Uncommenting DF_ALWAYS_WRAP_RESOURCES breaks the Services tab
DP-200 Fix restricted admin widget paywall
DP-202 Add PostgreSQL materialized view support