Merge pull request #3 from GerdZanker/master

Small improvements and fixes to have a stable trac plugin project
implemented a append and strip possibility for the Trac Browsing URL
Updated help texts
Finished [JENKINS-13366] for Trac git repositories.
The implementation and tests for Trac subversion repositories is
pending.
Merge pull request #4 from GerdZanker/master

Added more tests for existing subversion TracRepositoryBrowser class
[FIXED JENKINS-7032] and [FIXED JENKINS-13366]
Implemented and tested the strip and
append feature of the URL parts before the final Trac URL is build.
Merge pull request #5 from GerdZanker/JENKINS-7032

Fix for JENKINS-7032 and JENKINS-13366
chaning svm information to avoid problems during release, see https://groups.google.com/forum/?fromgroups=#!topic/jenkinsci-dev/OvWw0zqJI_E