* Add the ability to set defaults for flag.
You can now set defaults for flags by setting environment variables.
* Add flag no-ff to feature finish.
This gives the ability to never fast-forward a merge, even when it's only
one commit.
* Bugfix: Error in a long flag name for release finish
* Function in gitflow-shFlags refactored to make it faster.
* Add flag --squash-info to release/feature finish.
When you use the flag --squash while finishing a release or feature branch,
the logs don't make it clear which branch you merged. The new flag will add
an extra comment to the commit message, stating which branch was used for the
merge.
* Bugfix: The contrib gitflow-installer.sh shows wrong installation instructions.