Some tweaks to the performance test styles, upgraded to jquery 1.11.0.
Added some controls to show/hide various columns in the performance reports.
Some style tweaks for performance test reports.
Show the same set of versions for all tests on the front page for the performance test reports.
Changed the performance test reports so that each branch is treated as a separate 'version' in the test history table.
Treat each branch as a 'version' in the performance test history charts.
Colour the highest and smallest value for each measurement in performance test results.