Merge pull request #81 from sbesson/submodule_include2

Submodule inclusion in merge commands
Merge pull request #80 from sbesson/pypirc_ignore

Ignore .pypirc configuration file used for package registration
Add low-level git command for tagging repositories
Add logic for passing tag arguments to update-submodules command
Do not create PR comment when outside Jenkins environment
merge master -D org -I include -E exclude: PR 82 (Add logic to create tag while updating submodules)