Add contributing guide

CONTRIBUTING.md

@@ -0,0 +1,42 @@
+How to Contribute
+=================
+
+Inbucket encourages third-party patches. It's valuable to know how other
+developers are using the product.
+
+
+## Getting Started
+
+If you anticipate your issue requiring a large patch, please first submit a
+GitHub issue describing the problem or feature. You are also encouraged to
+outline the process you would like to use to resolve the issue. I will attempt
+to provide validation and/or guidance on your suggested approach.
+
+
+## Making Changes
+
+Inbucket uses [git-flow] with default options.  If you have git-flow installed,
+you can run `git flow feature start <topic branch name>`.
+
+Without git-flow, create a topic branch from where you want to base your work:
+  - This is usually the `develop` branch, example command:
+    `git checkout origin/develop -b <topic branch name>`
+  - Only target the `master` branch if the issue is already resolved in
+    `develop`.
+
+Once you are on your topic branch:
+
+1. Make commits of logical units.
+2. Add unit tests to exercise your changes.
+3. Run the updated code through `go fmt` and `go vet`.
+4. Ensure the code builds and tests with the following commands:
+  - `go clean ./...`
+  - `go build ./...`
+  - `go test ./...`
+
+
+## Thanks
+
+Thank you for contributing to Inbucket!
+
+[git-flow]: https://github.com/nvie/gitflow

README.md

@@ -1,5 +1,6 @@
-Inbucket [![Build Status](https://travis-ci.org/jhillyerd/inbucket.png?branch=master)][Build Status]
+Inbucket 
-========
+=============================================================================
+[![Build Status](https://travis-ci.org/jhillyerd/inbucket.png?branch=master)][Build Status]
 
 Inbucket is an email testing service; it will accept messages for any email
 address and make them available via web, REST and POP3.  Once compiled,
@@ -8,21 +9,22 @@ are all built in).
 
 Read more at the [Inbucket Website]
 
-Development Status
+
-------------------
+## Development Status
 
 Inbucket is currently production quality: it is being used for real work.
 
-Please see the [Change Log] and [Issues List] for more details.
+Please see the [Change Log] and [Issues List] for more details.  If you'd like
+to contribute code to the project check out [CONTRIBUTING.md].
 
-Homebrew Tap
+
-------------
+## Homebrew Tap
 
 Inbucket has an OS X [Homebrew] tap available as [jhillyerd/inbucket][Homebrew Tap],
 see the `README.md` there for installation instructions.
 
-Building from Source
+
---------------------
+## Building from Source
 
 You will need a functioning [Go installation][Google Go] for this to work.
 
@@ -41,8 +43,8 @@ the web interface will be available at [localhost:9000](http://localhost:9000/).
 The Inbucket website has a more complete guide to
 [installing from source][From Source]
 
-About
+
------
+## About
 
 Inbucket is written in [Google Go]
 
@@ -51,6 +53,7 @@ version can be found at https://github.com/jhillyerd/inbucket
 
 [Build Status]:     https://travis-ci.org/jhillyerd/inbucket
 [Change Log]:       https://github.com/jhillyerd/inbucket/blob/master/CHANGELOG.md
+[CONTRIBUTING.md]:  https://github.com/jhillyerd/inbucket/blob/develop/CONTRIBUTING.md
 [From Source]:      http://www.inbucket.org/installation/from-source.html
 [Google Go]:        http://golang.org/
 [Homebrew]:         http://brew.sh/