Cache maven dependencies to speed up build, prevent timeouts (sonatype-nexus-community#32)

💨

Author: DarthHater

.travis.yml

@@ -1 +1,5 @@
 language: java
+
+cache:
+  directories:
+  - $HOME/.m2

README.md

@@ -20,6 +20,7 @@
 * [Developing](#developing)
    * [Requirements](#requirements)
    * [Building](#building)
+   * [Travis CI](#travis-ci)
 * [Using Composer with Nexus Repository Manger 3](#using-composer-with-nexus-repository-manager-3)
 * [Installing the plugin](#installing-the-plugin)
    * [Temporary Install](#temporary-install)
@@ -46,6 +47,11 @@ To build the project and generate the bundle use Maven
 
 If everything checks out, the bundle for Composer should be available in the `target` folder
 
+### Travis CI
+
+This project is built automatically with Travis CI, and you should be able to see build results on your commits, as well
+as directly on [Travis CI](https://travis-ci.org/sonatype-nexus-community/nexus-repository-composer/).
+
 #### Build with Docker
 
 `docker build -t nexus-repository-composer:0.0.2 .`