moved section Contributing to own file

Author: stritti

README.md

@@ -349,26 +349,7 @@ Short overview of features, which are supported:
 
 # Contribute
 
-We are glad to see your pull requests. 
-
-We use Travis as our continous integration build. Because of Travis security reasons on a Pull Request only JUnit tests run. 
-The integration tests need a valid AIRTABLE_API_KEY which travis doesent provide on PR's from forked reposiorys.
-However the integration tests you wrote will run after the PR is confirmed and merged.
-
-## Current status
-
-The current status of our project is maintained on our agile board:
-[Kanban Board of airtable.java](https://github.com/Sybit-Education/airtable.java/projects/1)
-
-## Compiling project
-
-airtable.jave is developed and compiled using Java 8.
-
-
-We use [Gradle](https://gradle.org) to compile and package project:
-
-+ for tests run: `./gradlew clean test`
-+ build jar: `./gradlew jar` (The built JARs will be placed under `build/libs`.)
+see: [CONTRIBUTING.md](./CONTRIBUTING.md)
 
 ## Testing