Changed version of SVNKit. now uses version 1.7.9 which supports SVN 1.7!
Updated version of Jenkins, Nexus and Sonar.

Jenkins 1.491 not support SVN 1.7 repositories.

Jenkins: 1.491 to 1.517
Nexus: 2.3 to 2.5.0-04
Sonar: 3.3.2 to 3.5.1
Updated Jenkins plugins.

Updated plugins:
analysis-core
dry
pmd
findbugs
checkstyle
m2release
redmine
sonar
Merge pull request #36 from RobertoSchneiders/master

Support for SVN 1.7. Updated versions of Jenkins, Nexus Sonar. Updated Jenkins plugins