This is a spin-off fork from prystasj/maven-groovy-spock-archetype, aimed at fixing/upgrading a couple of archetype pom definitions.
Specifically,
1) groovy.version property is updated to 1.8.5
2) added project.build.sourceEncoding default property as 'utf-8'
3) maven-compiler-plugin is upgraded to 3.1
4) maven-surefire-plugin is upgraded to 2.14.1
5) added includes for **/*Test.groovy and **/*Spec.groovy sources in maven-surefire-plugin configuration