Update documentation about Maven configuration

[crumbpicker]

The list of provided repositories is obsolete.
This new one worked fine for me.

guiceyfruit.repository
Google GuiceFruit Repository
http://guiceyfruit.googlecode.com/svn/repo/releases/


akka.repository
Akka Maven Repository
http://repo.akka.io/releases/


jboss-public-repository-group
JBoss Public Maven Repository Group
http://repository.jboss.org/nexus/content/groups/public/


maven-repository
Public Maven Repository
http://repo1.maven.org/maven2/

[noelwelsh]

I don't think most of that stuff is needed any more. In the book I'm using this build.sbt, which is quite minimal:

https://github.com/noelwelsh/making-eyes/blob/master/_calculator-service/build.sbt