Enhance dev_env_setup.md

[cverbiest]

I'm not sure if an issue is required to open a PR.

I did some enhancements to the process described in resources\markdown\dev_env_setup.md

• Use DLC variable instead of changing ini file
• Add create_db to build.xml
• Use %DLC%\ant

I'll create a PR for those changes.

[PauliusKu]

Merged