Add configuration options for using testing branch
Fix git config variable name
Fix missing function definition and typo
Add true as a possible answer for using testing
Update release to use RELEASE_BASE (defined by USE_TESTING) and only include DEVELOP_BRANCH if USE_TESTING is set
Add testing status and update command and include TESTING_BRANCH updates and global setting in hubflow-common
Merge pull request #5 from invodo/feature/add_functional_testing_branch

Add functional testing branch capabilities.