V4.4.0-rc2

Feature: Added standardised a version block to help with in model version management
Feature: Added config parameter to Memory read, which reads a config parameter from /etc/go-simulink/
Feature: User can now configure a simulink codegen/cache folder to prevent cluttering of the project folder
Feature: Diagnostic blocks now follow the SAE J1939 DTC standard
Fix: Fixed output module groundshift datatype

Full Changelog: V4.4.0-rc1...V4.4.0-rc2