Added a short checklist for maintainers. (#95)

Author: Nyholm

docs/maintainers.md

@@ -0,0 +1,17 @@
+# Documentation for maintainers
+
+Since this is a Ruby tool used by PHP programmers it might be a good idea to document
+some things. 
+
+
+## Making a release
+
+Checklist for making a release: 
+
+- Write changelog 
+- Update version number in `capistrano-symfony.gemspec`
+- Make a new release with GitHub 
+- Build the gem with `gem build capistrano-symfony.gemspec`
+- Push the gem to rubygems.org: `gem push capistrano-symfony-X.X.X.gem` 
+- Add the `capistrano-symfony-X.X.X.gem` to the GitHub release 
+