Bug fix and feature addition.

Bug Fix:
      In build pipeline view, the arrows were displayed for some of the jobs, even when there were no more child jobs.

Feature Addition:
      This is described in an enhancement issue - 114. It would be great if the users have the flexibility to change the look and feel of the pipeline view. Users should have the freedom to use their own custom styles with corporate logos and color schemes.
Added a configurational parameter to do this.