[archetype-clean] Updated Archetype

  * Now using the correct backend artifactId
  * Replaced slf4j-log4j with logback
  * AppName is now automatically inferred
  * Added Java 7 enforcing
[webapp-archetype-clean] Updated Archetype

  * Now using the correct backend artifactId
  * Replaced slf4j-log4j with logback
  * AppName is now automatically inferred
  * Added Java 7 enforcing
[module-archetype-clean] Added Java 7 Configuration
Merge pull request #161 from jcarvalho/fix/archetypes

Fixing Archetypes