#78 - Updated build plugin version to the latest ones available.

Wagon SSH - 2.3 -> 2.6
Surefire - 2.12 -> 2.17
JAR - 2.3.1 -> 2.4
Source - 2.1.2 -> 2.2.1
JavaDoc - 2.9 -> 2.9.1
Deploy - 2.7 -> 2.8.1
#79 - Upgraded JavaDoc dependency reference URLs to latest ones.

Spring - 3.1.x -> 3.2.x
Java - 1.5 -> 1.6
Spring Data Commons - latest URI structure