[docs] README includes more information about contributions

README.md

@@ -1,15 +1,50 @@
-# dd-trace-go
-
 [![CircleCI](https://circleci.com/gh/DataDog/dd-trace-go/tree/master.svg?style=svg)](https://circleci.com/gh/DataDog/dd-trace-go/tree/master)
 [![Godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/github.com/DataDog/dd-trace-go/tracer)
 
-The Datadog go tracing package. Currently requires at least Go 1.7.
+A Go tracing package for Datadog APM.
+
+## Contributing Quick Start
+
+Requirements:
+
+* Go 1.7 or later
+* Docker
+* Rake
+* gometalinter – `go get -u github.com/alecthomas/gometalinter`
+* golint – `go get -u github.com/golang/lint/golint`
+* goconst – `go get -u github.com/jgautheron/goconst/cmd/goconst`
+* gas – `go get -u github.com/GoASTScanner/gas`
+* ineffassign – `go get -u github.com/gordonklaus/ineffassign`
+* gocyclo – `go get -u github.com/fzipp/gocyclo`
+
+### Run the tests
+
+Start the containers defined in `docker-compose.yml`:
+
+```
+$ docker-compose up -d
+```
+
+Fetch this package's dependencies:
+
+```
+$ rake get
+```
+
+This will only work if your working directory is in $GOPATH/src.
+
+Finally, run the tests:
+
+```
+$ rake ci
+```
+
+### Create a Branch
 
-Sample code: https://godoc.org/github.com/DataDog/dd-trace-go/tracer#pkg-examples 
-List of integrations: https://godoc.org/github.com/DataDog/dd-trace-go/tracer#pkg-subdirectories
+???
 
-## Directory structure
+## Further Reading
 
-- [tracer](https://github.com/DataDog/dd-trace-go/tree/master/tracer): contains the low level API used to trace the different libraries.
+Automatically traced libraries and frameworks: https://godoc.org/github.com/DataDog/dd-trace-go/tracer#pkg-subdirectories
+Sample code: https://godoc.org/github.com/DataDog/dd-trace-go/tracer#pkg-examples
 
-- [contrib](https://github.com/DataDog/dd-trace-go/tree/master/contrib): contains the different libraries supported by our APM solution.