No longer use mvn:install for local libs, point mvn at src/local-libs 'repo'

* People were not doing the pre-install Python script step so this new method
  removes the need for it
* It does however spit out warnings about a missing pom.xml file for the
  dependencies, however I am not sure how to fix it since local repos' isn't
  the best maven practice
* In future try to host these/find them on maven
Merge pull request #14 from sarahtattersall/maven_dependencies

No longer use mvn:install for local libs, point mvn at src/local-libs 'repo'