Moved git_bug_feature_refactor to git_extras_common
Added current_branch and branch_exist functions
Updated Makefile with reference to git_extras_common
Fixes to branch_exist
Development branches now originate from integration branch
Fixed a few conditionals in git_extras_common
Updated Readme.md with changes to dev branches
Added refresh command and documentation
Moved original work under dev_branches to workflow

This will allow all the workflow changes to be consolidated under
one branch and submitted under one pull request.
Documentation updates for workflow commands