Added an option to set a directory for hooks and filters in "git flow init" or using "git config gitflow.path.hooks <value>"
Added global variable containing absolute path to current git repository
Refactoring: Moved detection of deprecated env flags outside of main()
Update changelog.
Update of the contributers.
Version bump 1.7.0-dev.39
Merge branch 'feature/107_global_hooks_and_filter_directory' into develop

Closes #107
Base config not removed when deleting a branch.

The base configuration is not removed when you delete a feature/hotfix/release branch.