Fix for git flow feature pull

git_branch_exists always returns true in this case since the feature branch you're trying to pull out of the remote is indeed going to exist in the remote. The check should be for local branches only.
Closes #109 and closes #108
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.
Change wording in changelog
Shown text is wrong.

Closes #117
Invalid function call

The function expand_nameprefix_arg has been renamed.

Closes: #118
No make installer fails

Repository URL requires https instead of http
Version bump 1.7.0-dev.46
Merge branch 'feature/125_no_make_installer_fails' into develop

Closes #125
Wrong variable is checked.

The function should check for VERSION.
Wrong variable used.

We should use the variable VERSION.
Wrong variable used.

We should use the variable VERSION.
Wrong variable used.

We should use the variable VERSION.