Support m2e/Eclipse integration in hibernate-enhance-maven-plugin

It would be nice if hibernate-enhance-maven-plugin included m2e support.

See https://wiki.eclipse.org/M2E_compatible_maven_plugins

Adding such support would eliminate having to manually add m2e configuration to the pom for every project that uses hibernate-enhance-maven-plugin and would speed up development by only causing Eclipse to refresh files that are changed by the plugin.