If no changes to addon.xml or changelog, nothign to commit

```
[?] I'm ready to commit the changes and tag the release. Should we continue? (Y/n) y

.. Release 0.1.0..

Adding local changes to staging...OK
# On branch master
# Your branch is ahead of 'origin/master' by 1 commit.
#
nothing to commit (working directory clean)
Command 'git commit -m "[xam-release-script] creating release for version 0.1.0"' returned non-zero exit status 1
```
