- update the Java templates to work with lambda proxy integration
out-of-the-box
- use "Map<String, Object>" as input type for greater flexibility
- update gradle wrapper from 3.1 to 3.2.1
- configure gradle and maven to use Java 1.8
- change the package from "hello" to "com.serverless" and adjust
serverless.yml accordingly
- configure logging (log4j)
- adjust tests
- git-ignore some Eclipse specific files
