Added checklist for new release

doc/checklist_new_release.md

@@ -0,0 +1,30 @@
+The following steps should be performed before releasing a new storm version.
+Note that in most case a simultaneous release of [carl](https://github.com/smtrat/carl), [storm](https://github.com/moves-rwth/storm), [pycarl](https://github.com/moves-rwth/pycarl/) and [stormpy](https://github.com/moves-rwth/stormpy/) is preferred.
+
+1. Update `CHANGELOG.md`
+   To get all the commits from an author since the last tag execute:
+   ```console
+   git log last_tag..HEAD --author "author_name"
+   ```
+
+2. Update used carl version:
+  * Update `GIT_TAG` in `resources/3rdparty/carl/CMakeLists.txt`
+  * Maybe update `CARL_MINVERSION` in `resources/3rdparty/CMakeLists.txt`
+
+3. Check that storm builds without errors and all tests are successful
+   * [Travis](https://travis-ci.org/moves-rwth/storm) should run successfully
+
+4. Set new storm version:
+   * Set new storm version in `version.cmake`
+
+5. Set new tag in git
+   ```console
+   git tag new_version
+   git push origin new_version
+   ```
+
+6. [Add new release](https://github.com/moves-rwth/storm/releases/new) in Github
+
+7. Update [Homebrew formula](https://github.com/moves-rwth/homebrew-storm)
+
+8. Announce new storm version on [website](http://www.stormchecker.org/news.html)