added a contributor file

Author: sjyk

CONTRIBUTING.md

@@ -0,0 +1,57 @@
+## Making Changes
+
+* Create a topic branch from where you want to base your work.
+  * This is usually the master branch.
+  * Only target release branches if you are certain your fix must be on that
+    branch.
+  * To quickly create a topic branch based on master; `git checkout -b
+    fix/master/my_contribution master`. Please avoid working directly on the
+    `master` branch.
+* Make commits of logical units.
+* Check for unnecessary whitespace with `git diff --check` before committing.
+* Make sure your commit messages are in the proper format.
+
+````
+    Make the example in CONTRIBUTING imperative and concrete
+
+    Without this patch applied the example commit message in the CONTRIBUTING
+    document is not a concrete example.  This is a problem because the
+    contributor is left to imagine what the commit message should look like
+    based on a description rather than an example.  This patch fixes the
+    problem by making the example concrete and imperative.
+
+    The first line is a real life imperative statement with a ticket number
+    from our issue tracker.  The body describes the behavior without the patch,
+    why this is a problem, and how the patch fixes the problem when applied.
+````
+
+* Make sure you have added the necessary tests for your changes.
+* Run _all_ the tests to assure nothing else was accidentally broken.
+
+## Making Trivial Changes
+
+### Documentation
+
+For changes of a trivial nature to comments and documentation, it is not
+always necessary to create a new ticket in Jira. In this case, it is
+appropriate to start the first line of a commit with '(doc)' instead of
+a ticket number.
+
+````
+    (doc) Add documentation commit example to CONTRIBUTING
+
+    There is no example for contributing a documentation commit
+    to the Puppet repository. This is a problem because the contributor
+    is left to assume how a commit of this nature may appear.
+
+    The first line is a real life imperative statement with '(doc)' in
+    place of what would have been the ticket number in a
+    non-documentation related commit. The body describes the nature of
+    the new documentation or comments added.
+````
+
+## Submitting Changes
+
+* Push your changes to a topic branch in your fork of the repository.
+* Submit a pull request to the repository in the puppetlabs organization.
+* We will try our best to give timely feedback on PRs