CI-64
- expose confab API to iterate over hosts and roles
- simplify even more directory specification in API calls

+review SYS @jesse
CI-64
- get default generated and remotes dirs from environmentdef.directory
- allow to override these dirs in Conffiles calls

+review SYS-102
CI-64
expose make_conffiles api

+review SYS-102
CI-64
rename 'iterconffiles' to 'iter_conffiles'
fix diagnostics

+review SYS-102
Merge branch 'feature/iter' into develop